This is what I'm talking about. No rambling bullshit, no terrible camera angles, just pure unadulterated information delivered in a calm and soothing manner. This is ASMR for driveway mechanics. Thank you!
This has to be one of the best if not THE best videos on how to troubleshoot fuel systems. Only someone who is selfless takes this much time and puts this much detail into their videos! You just earned a subscriber. I can’t thank you enough. My son and I are troubleshooting our 98 K1500 no start after rebuilding the top half of the engine. Again, THANK YOU!!!
EXCELLENT..I love your style, casual, informative and proper technique without all the tech toys. I've seen volumes of car repair videos but this is one of the first ones I have actually watched intently from start to finish fully satisfied. What makes your teaching style a perfect fit is that you troubleshoot with the same resources that I have-a digital multimeter. a test light and your trouble-shooting flow process which gets us down to the actual problem & solution. Beats running back & forth from the auto parts store just buying parts. Lastly you reflect on repair as a whole and consider what collateral concerns should be addressed with the repair. I think its awesome how you tied the Fuel Pump Relay to the Oil Pressure Switch and referenced all to the schematics, Thank you
Thanks for taking a big problem (3500lbs of truck that don't start/move) and turning into a small problem...By using LOGIC and very simple tools to say the least..I call schematics "road maps" you need them to figure out where you are and how and how to get un-lost..simple! Thank you job well done!
WOW....schematics FINALLY make sense to me. Great Video! Especially the fact you did everything old school as well as posting the diagram while explaining the relay. It really simplifies everything making it much easier to digest. Thank you!
Thank you for taking the time to make this video .I just applied what I learned and looked like a genius where my friend had his truck being worked on but after replacing the distributor ,plug wires,plugs etc.the same problem was happening.He asked me to go down with him and take a look and see if I could see anything. Of course i had asked for the year and make and watched this video prior to going down there and I can't tell you how surprised everyone was.Of course I didn't tell them that I watched this video prior to going down there but I just was amazed at there stunned faces Thank you again Scott
I was having some trouble figuring out how to install a kill switch on the fuel pump signal on my '92 Chevy Suburban. Your explanation of how the fuel pump relay circuit works was just what I needed to understand where I needed to splice in with the kill switch. Thank you so much!
I always hate searching you tube for videos cause so many are poorly done. You made an awesome Video. Well thought out and good video quality. I really like that you give the Schematic and explain what you are doing at each step. Again great video and very helpful.
Hey THANK YOU...i was having some issues with my truck, 97 Chevy k1500 and was thinking I had to change the fuel pump...I didn't do all the test that you did but went right to the parts store and purchased the relay....started right up...You saved me time and money...great video...thanks again!
Just did this with my 1999 Tahoe and it was the relay. Thanks for your help! Already had the new pump on hand before deciding to try this. Saved me a ton of work!
Will I have looked high and low to find someone that could show how to check this particular problem out. My wife has a 1989 Chevy Blazer K1500 that just died on her way home. I know my way around with a wrench a little, but this computer controlled stuff always throws me for a loop. I'm on SS thus a very fixed income. You Sir have been a God send when I found your channel. Your explanation and visual presentation is just what I needed. Seems I had a complete system failure. Replaced the fuel pump and everything seemed ok, till my wife broke down again. "May" have been my fault for not attaching the fuel pump relay back on to the fire wall. Never the less, fuel pump was ok, your computer test was spot on. Bad computer, bad relay and bad oil pressure switch. All fuses and fusible links were fine. Thank you, Thank you, Thank you Will. I need to mention that my service manuals have the fuel pump wire as gray. It is in fact tan with white tracer to fuel pump as is the oil pressure switch fuel pump lead. Also on this Blazer with Cruz control, the rotor cap must be removed and the distributor needs to be loosened to get at the oil pressure switch If you are ever in the North Western part of SC, I owe you and adult beverage or two at the very least. Thanks again Will.
Excellent video my Tahoe was doing the same thing, used a wire and it crunk right up. Used a extra fuel block now my truck is running good!!!! Thanks....
WOW! You just saved me a bunch of time, effort, frustration and money brother! I REALLY appreciate this video and the way you broke it down, simple for the the average 'joe' (me). Followed it to a 'T' and it solved my problem with my 1999 GMC Suburban. Can't thank you enough! Keep up the GREAT work and God Bless!
Top of the line video thanks your mechanical skills are sir perv. With your Insight I have learned a lot. I am having the same problem with the same motor and with your process of elimination I found my problem it was my relay also what a headache
Awesome video! After my trusty old Ford Explorer suddenly died with a trailer full of cardboard flatpacks on the way back home from IKEA the other night, I now need to chase down some gremlins to bring it back to life. Following your "mechanical / spark / fuel" checks, I determined that the engine cranks fine, then I hooked up a fuel pressure tester I got a few months ago when my 14 year old fuel pump could only muster enough pressure to run at idle. I installed a new pump, and all was well for a few months, but now I have 0 pressure. No wonder the car wont start or run anymore. I suspect the relay is also 14 years old, and thanks to your video, I know how to test it. Thank you!
Thanks for this video. I just got my 87 chevy working again. I was about to drop that gas tank but wanted to make sure it wasn't something minor first. Did the test in the video and solved the relay issue.
What was wrong with urs ? I have a 1987 chevy v20 put a brand new electric fuel pump and cleaned out tank had someone install it turned and i was able to drive it around just for 10 mins after it wont turn on wont pump gas?
Thanks for the tips. Neighbor has a 92 Silverado that would stall like every 5 minutes. First the pick up coil in the distributor was replaced and truck ran fine for months. Same symptoms again, replace same pick up coil, still shutting down about every 5 minutes. Found out the fuel pump was shutting down. Listened to various videos and replaced fuel pump relay and then oil pressure/fuel switch. Ran for another 5 to 7 minutes and fuel pump stopped running again. Checked ECM for power to fuel relay and had power with key. Pulled relay and powered pump direct with fused 12 volts. Fuel pump ran for 5 to 7 minutes and stopped. Found out that truck was stolen years ago and a remote kill switch for fuel pump was added. A long story now shortened, kill switch was getting hot and interrupted power to pump. Replaced switch with a switch rated for proper amp rating and fuel pump operation now fixed. Patience is key in troubleshooting! Thanks though for the video!
been having same problems as you show on 87 gmc w/5.7 like the way you do the old school test ! worked on my truck got it running thanks for the video!
Thanks for the great video. I seldom subscribe or leave comments but this video was so helpful and informative I was compelled to do both. Great camera work, and perfect and easy to understand explanation of the schematics and troubleshooting process. The split screen description of the circuitry and testing was awesome. I just wish I'd have watched this before going through the hassle of draining 20+ gal of fuel, dropping tank, and pulling apart the fuel pump only to find nothing wrong with the pump.
This auto technician is showing us something that is just so valuable. These "methods" are priceless. I am trying to learn auto-electric, and guys like this on Robinson Automotive have taught me so much. He's one of the Best on RUclips.
Mr Robinson you make a very good and INTERESTING instructor. Very clear. Knowledgeable and great use of schematics flow charts. I am a retired Vocational instructor of 30 years. So when I tell you are a very good instructor you ARE!
I can hear fuel pump at prime and have no fuel at shrader valve on my fuel rail.. Pump and filter have been changed within past couple yrs.. Its got me mad lol. I may have to change pump again.. I held that vavle in and had friend hit key nothing
This was a fantastic video. My fuel pump in my 89 K1500 wasn't working, and honestly automotive electric kinda scares me. I should have followed your video first, but being daunted by the electrical stuff, ended up replacing the entire fuel pump and assembly first. After that didn't solve my problem, I turned to the oil pressure sensor. Again, didn't fix the issue. Finally, I realized it had to be electrical, which was terrifying for me to deal with. Went back to your video with a new sense of desperation, and tested my relay. The numbers on my relay and yours didnt match since we have different vehicles, but the way they operate is the same, so I was able to match up which ones did what, and ended up successfully jumping it with a short piece of wire. Looks like I'll be buying a $8 relay tomorrow, and the $80 fuel pump and $30 in sensors lets just chalk up to "preventative maintenance"....
Best instructional video EVER! I am restoring a 1987 Chevy K5 Blazer and this video is the reason I was able to drive it from the storage yard to my house. Thank you so much for this video.
Many thanks for the down to earth, old school troubleshooting methods, even though my problems have to do with my fuel tank switching valve on my 87 Silverado, you've given me some food for thought about what else to do. I hope you might have other videos that might relate to that issue as well.
no need to jump a wire to check the fuel pump just turn on the key and listen in the gas filler cap if the pump is working you will her it running then shut off when it builds up pressure lol . most of the time your can hear the pump with out listening in the filler cap. the easiest way to check the relay is have some one turn the key on while you hold your finger on top of the relay . if its good you will feel it click under your finger and most of the time you can also hear the relay click . or you can just do like most do and have a extra relay in your glove compartment and just change it out to see if that was it. 2/3 of the time the modular in the distributor is your problem they cause many problems with starting . the modular controls both spark and makes your injectors in a throttle body system pulse and pump fuel into the injectors . if you have fuel and spark and it wont start check the wires at the injectors if it has fire leave your test light hooked up to the injector wire and turn the motor over the light should go off and on not just stay on all the time. if the light will not come on or go off as you turn the motor over the modular is bad change it and no more problem. the modular took the place of points for fire but also woks to break the fire on and off to the injectors to pump fuel into the motor. the first s10 I had this problem with I changed the fuel pump, then fuel regulator or meter , the injectors, and everything I could think of because I had spark and fuel to the injectors but no fuel would sprat out of them. then some one told me about the modular and what it did .I changed the modular and it was fixed. that was around 20 years ago and since then I have had several do the same thing and its always the modular. now I have hundreds of relays laying around and yes I will pull one out and replace it with another first but if that don't work I go to the modular next !if you run a old car or truck with the throttle body fuel injection system its best to carry extra relays in your glove compartment as well as ether another modular or whole distributor .
I have a 1992 k1500 with the fuel pump relay located on the firewall, I took it off and found that the terminal with the orange wire has no power going to it which is causing the fuel pump not to pump, do you know why there might not be any power going to that terminal?
Thank you for your thorough review... In case it helps, simply using another relay with the same value and swapping it out may be faster... If the horn relay is the same, then switch it (sound the horn) and test to see if that is all that is needed... I am sure you know that too. Rafael
Great info. I used this info to determine if mine was out... and it was! Thank you very much for the well thought out and great pace to understanding this problem!
This is an Excellent ! Video and should give anyone watching this series a no fail fix to this particular common problem. Its a Great explanation on how to interpret a schematic for this circuit . It shows how to confirm a good ground using a test light which many people have trouble understanding a ground circuit and its role . My father-in-Law has a 1990 Silverado with this exact problem . I Have Subscribed ! Thank You !
I thought this video was extremely well spoken and clear. im a pretty decent shade tree mech, but I still learn things all the time. ty for sharing. i'll be watching more in the future.
Thanks to your video I was able to fix my '95 G20. It needed a fuel pump relay connector. Thanks so much for taking your time to educate and help others :)
A fantastic tutorial! Thank you Robinson's Auto! I found my 97 GMC 5.7 would only run on the fuel poured in the carburetor to prime it. After watching this video, I immediately went to the step where I jumpered terminal 30 to terminal 87. I heard the fuel pump start, but the engine would not run. While the fuel pump makes noise, I fear there's trouble with the impeller or something related to the fuel pump. I guess the next step is to verify fuel pressure at the manifold. This is going to be a little more difficult to do as I'm not equipped to do so. I hope I can find enough parts to assemble a test gauge. A loaner gauge from AutoZone showed 14 PSI at the fuel rail by the throttle body. Looks like it's time for a fuel pump. I have a new pump assembly in hand. Will also replace the fuel filter. As the tank had just been filled to the top when the pump failed, I'm not looking forward to dropping it. I'm not looking forward to raising the bed either. I'm going to cut an access hole in the bed of the truck. I like that simple approach. It's an older truck, and I can make a nice access cover. The access hole in the bed of the truck is the way to go! Be careful with dimensions that you find online. I found two different sets of dimensions and both were wrong. Following them would have given me a useless hole looking at the top of the fuel tank where there is no fuel pump access. I determined my own access hole location. It was very close but I had to enlarge it slightly once the hole was opened. Contact me directly if you would like my dimensions for a '97 GMC Sierra SL. 8-foot bed. C2500. 3/4 ton. High GVW. 8400 lb GVW. 34 gallon fuel tank. I'll be glad to forward you the dimensions for the hole location. The most difficult thing about changing the fuel pump was loosening the fittings when the lines transitioned from steel to rubber. For details how I was successful, feel free to contact me as well. Perhaps I'll make a video someday.
Ab-Ra-Fricking-Ka-Dabra! Just like that. Thank you kind Sir. I was raised by a mechanic and you just changed my life with your explanations of what-wire-does-what on a relay and MORE! Thank you. Thank you. Thank you.
Dang Man, that was an outstanding video. Can't wait to watch the next one with the oil pressure switch troubleshooting. I also need to go to beginning as I don't recall if the fuel pump was cycling. My 88 K2500 is cycling but I did notice the oil pressure build slow and the voltage looks like its taking a big hit during attempting to start. This all began on a cold snap and my opportunities to evaluate have been limited. This will give me some possible options to analyze tomorrow. Natural born teacher you are indeed. Great job!
Excellent video. I was just getting ready to get under my 95 Silverado and check the fuel pressure. I will have to watch this a few times to understand the circuits but excellent explanation.
Great video man... Thank god for you and thank god for the Internet you just saved me a whole bunch of time and labor ... I could have swore my fuel pump was bad... Turns out I had the same issue... Bad relay... Thanks again
Took me 2 days figure it out, replaced ICM, and fuelcut/ oil pressure switch no issues since. Wish woulda found your channel, but was a good learn of my trucks systems for me.
Good work mate, using basix tools that anyone would have. Just what I needed as I don't know anything about automotive electrical repairs. All the best from Australia. 🙃
I really enjoy watching these videos I like the way you explained the diagnosis, also I like the way you troubleshoot it, and challenge the viewer on what to do next, I think that is so cool, so I hope you are still making videos I really enjoy them thank you, for your help,
Really well done and you may have saved me a lot of work! My symptoms are very similar and I was about to drop the tank this weekend to replace the pump. I'll now run through your instructions to verify I am getting correct grounding and supply voltages. Thank you very much for creating this video!
Thank you for your informative video! I'm sure to advance my mechanical aptitude with your thorough step by step tutorial. Much respect and gratitude for your service. Thank you sir.
i did the same thing he did with relay but my truck wouldn't start. Ran out just like he said only to find out that my relay was good. So it must be the B1 sensor oil pressure switch. This guy is good. Thumbs up from Detroit.
I wish I watched this video earlier I bought all new battery, alternator, and starter still didn't resolve my problem. I want to thank you for this video very helpful you explained everything I needed to know very well
Great info. video! I enjoyed watching and learning from this. You explain all so clear and with captivating ability. You should be an automorive instructer. I learned some things, thank you much Mr. 👍🏻👍🏻
Thank you for the kind words and feedback! That was a dream of mine. Not sure if it will ever happen but I truly enjoy sharing my knowledge on here. It’s my way in a way lol
Great tutorial! Thanks! I had a problem with my chevy venture where it wouldn't start. I tried spraying in starting fluid into the air intake and it briefly started. It sounded like the fuel pump energized. So I replaced the in-line fuel filter and it started ok.
this video helps alot gmc, chevy trucks like dtc 54, is a problem with lots of people changing dtc 34 (map) and dtc (43) when you get a dtc 54 check your fuel relay and your oil pump switch these two work together that's way you get a carking bout no start, ,dtc 54 says fuel pump circuit fault or mixture control but won't say check your oil pressure switch. but some people think it's the fuel pump (some times)..
that was a great educative video , thank you for the time and effort to teach us all on thuis subject matter , i have a friend i have been helping since today : he owns a working pickup truck made : Chevrolet , yr 1990 , class K1500 , Eng : 4.3L V6 , last week i helped him replace entire front differential and axles with new upper arms and new sway bar adapters and replaced shocks with new to size ( the mechanic cheated him by installing cheap grade P 70 , rather P125HE recommended ( this made the vehicle drive with no problems ) , today ? he was driving and suddenly the truck choked and died out , symptoms : it cranks but wont start , checked : fuel pump, fuel pressure , sparks , distributor , distributor modules , spark plugs , wires : all came negative : working fine . EGR : working fine . cam valves : i checked them through view point of Engine oil cap off , they are cranking fine . the Question : what do you think in your experience causing it not to start ? i am thinking it has to do with compression ?
Absolutely fantastic video, I think you could be an ivy league professor if wrenching doesn't work out haha ! Thanks very much for sharing, and teaching!
thanks bro this video was so very helpful ....after switching the tank and fuel pump i see this video and fixed my problem thank u very much u will be blessed
Man... YOU HAVE NO CLUE... How much help you have been to me! That is exactly my problem! Going straight to Autozone and buy that part! Yayyyy... ;) YOU ARE AWESOME! My hero literally!
Very good video. Thank you for going step by step through the diagnostic process. Regarding the oil pressure switch mentioned at the end of the video - I believe that is to cut off the power to the fuel pump should you lose oil pressure to avoid catastrophic engine failure rather than provide an alternative power supply to the fuel pump should the relay fail.
You are in my books a true professional/ Your video was very thorough yet to the point. You taught me a lot in a little time. And I thank you sir, for not wasting my valued time. I will be sure to subscribe to your channel and look forward to learning more from your videos. And ma God bless you and those who you hold near and dear to your heart and soul.
Great thorough explanation . If stuck on the road with no tools , you could swap another relay with the same number of pins . If you had to hike to the parts store , you could buy a relay if no other one is available . And also some brake cleaner . Give it a small amount of brake cleaner through the air intake . Obviously , if it runs there is an issue on the fuel side and not a spark problem . That oil pressure switch is also good to check . I don't believe there is a Schrader valve on any GM TBI systems to check fuel pressure . Thanks .
Thx for the video and good information I just got a 1988 Chevy Silverado I'm trying to figure the problem similar to this crank no start carb Thanks! Gave me good idea where to start.
This is what I'm talking about. No rambling bullshit, no terrible camera angles, just pure unadulterated information delivered in a calm and soothing manner. This is ASMR for driveway mechanics. Thank you!
You should have been a teacher. You present and explain things in a understandable and logical manner. Keep it up!
This has to be one of the best if not THE best videos on how to troubleshoot fuel systems. Only someone who is selfless takes this much time and puts this much detail into their videos! You just earned a subscriber. I can’t thank you enough. My son and I are troubleshooting our 98 K1500 no start after rebuilding the top half of the engine. Again, THANK YOU!!!
Ppp
This is by far one of the best videos I've ever seen on a troubleshooting job. Keep producing the same quality work
Thank you for the compliment
EXCELLENT..I love your style, casual, informative and proper technique without all the tech toys. I've seen volumes of car repair videos but this is one of the first ones I have actually watched intently from start to finish fully satisfied. What makes your teaching style a perfect fit is that you troubleshoot with the same resources that I have-a digital multimeter. a test light and your trouble-shooting flow process which gets us down to the actual problem & solution. Beats running back & forth from the auto parts store just buying parts. Lastly you reflect on repair as a whole and consider what collateral concerns should be addressed with the repair. I think its awesome how you tied the Fuel Pump Relay to the Oil Pressure Switch and referenced all to the schematics, Thank you
Thanks for taking a big problem (3500lbs of truck that don't start/move) and turning into a small problem...By using LOGIC and very simple tools to say the least..I call schematics "road maps" you need them to figure out where you are and how and how to get un-lost..simple!
Thank you job well done!
WOW....schematics FINALLY make sense to me. Great Video! Especially the fact you did everything old school as well as posting the diagram while explaining the relay. It really simplifies everything making it much easier to digest. Thank you!
4. C biiiiiiiiiiiiiiiiiiiiiiiiiie gyii7iikiiiiiiiiikikikikikik j j j j Ujjainjjjj jijjiiiii Ujjaiìikiinkkuukiiikkiikiiiiiikiiiikiiiiikiiikiiikiiiikiiikiiikikiikikii7kkik7ikiiii7i uhìii kikkiikkik7ikikkukikjuuii7k7ki7kkiiiiii7kkiii8iikii77kiikiik87k7i7ki78ii7ikiiiikkkii7777iik🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣😅😅🥲😆🤣🤣iki7kiki7i77iik7kmjmjj 😅ki7🥲😇🥲😙😙🥲7i7k777ik7ik7imkm77k7iiiiiiiiii45fyfyf6f6cycytcyr 5ŕŕ
Thank you for taking the time to make this video .I just applied what I learned and looked like a genius where my friend had his truck being worked on but after replacing the distributor ,plug wires,plugs etc.the same problem was happening.He asked me to go down with him and take a look and see if I could see anything. Of course i had asked for the year and make and watched this video prior to going down there and I can't tell you how surprised everyone was.Of course I didn't tell them that I watched this video prior to going down there but I just was amazed at there stunned faces Thank you again Scott
Love this!! Bam 💥 hahaha 🤣 this is a great story thank you for making my day !
I was having some trouble figuring out how to install a kill switch on the fuel pump signal on my '92 Chevy Suburban. Your explanation of how the fuel pump relay circuit works was just what I needed to understand where I needed to splice in with the kill switch. Thank you so much!
I used the wiper motor as a kill switch for my fuel pump
@@bennybritch8845 Oh that's quite clever! Does it cause issues when you use the wipers while driving?
excellent video I've been ase-certified for 20 years and as many other people who don't hear it said you my friend should go and be an instructor
I always hate searching you tube for videos cause so many are poorly done. You made an awesome Video. Well thought out and good video quality. I really like that you give the Schematic and explain what you are doing at each step. Again great video and very helpful.
Hey THANK YOU...i was having some issues with my truck, 97 Chevy k1500 and was thinking I had to change the fuel pump...I didn't do all the test that you did but went right to the parts store and purchased the relay....started right up...You saved me time and money...great video...thanks again!
Best most in depth troubleshoot video ever. And without fancy tools.
You sir are a pretty damn good teacher. Love that you showed schematics to elaborate more on the wiring. Awesome. Thanks man
This video was great. I have a 454 crusader giving me same trouble (cranking not starting) and this is the best trouble shooting video I've seen
Just did this with my 1999 Tahoe and it was the relay. Thanks for your help! Already had the new pump on hand before deciding to try this. Saved me a ton of work!
Will I have looked high and low to find someone that could show how to check this particular problem out. My wife has a 1989 Chevy Blazer K1500 that just died on her way home. I know my way around with a wrench a little, but this computer controlled stuff always throws me for a loop. I'm on SS thus a very fixed income. You Sir have been a God send when I found your channel. Your explanation and visual presentation is just what I needed. Seems I had a complete system failure. Replaced the fuel pump and everything seemed ok, till my wife broke down again. "May" have been my fault for not attaching the fuel pump relay back on to the fire wall. Never the less, fuel pump was ok, your computer test was spot on. Bad computer, bad relay and bad oil pressure switch. All fuses and fusible links were fine. Thank you, Thank you, Thank you Will. I need to mention that my service manuals have the fuel pump wire as gray. It is in fact tan with white tracer to fuel pump as is the oil pressure switch fuel pump lead. Also on this Blazer with Cruz control, the rotor cap must be removed and the distributor needs to be loosened to get at the oil pressure switch If you are ever in the North Western part of SC, I owe you and adult beverage or two at the very least. Thanks again Will.
Excellent video my Tahoe was doing the same thing, used a wire and it crunk right up. Used a extra fuel block now my truck is running good!!!! Thanks....
WOW! You just saved me a bunch of time, effort, frustration and money brother! I REALLY appreciate this video and the way you broke it down, simple for the the average 'joe' (me). Followed it to a 'T' and it solved my problem with my 1999 GMC Suburban. Can't thank you enough! Keep up the GREAT work and God Bless!
Top of the line video thanks your mechanical skills are sir perv. With your Insight I have learned a lot. I am having the same problem with the same motor and with your process of elimination I found my problem it was my relay also what a headache
Awesome video! After my trusty old Ford Explorer suddenly died with a trailer full of cardboard flatpacks on the way back home from IKEA the other night, I now need to chase down some gremlins to bring it back to life. Following your "mechanical / spark / fuel" checks, I determined that the engine cranks fine, then I hooked up a fuel pressure tester I got a few months ago when my 14 year old fuel pump could only muster enough pressure to run at idle. I installed a new pump, and all was well for a few months, but now I have 0 pressure. No wonder the car wont start or run anymore. I suspect the relay is also 14 years old, and thanks to your video, I know how to test it. Thank you!
You sir are a genius. My goal is to be a automotive Instructor. I'm sticking to this channel.
Thanks for this video. I just got my 87 chevy working again. I was about to drop that gas tank but wanted to make sure it wasn't something minor first. Did the test in the video and solved the relay issue.
What was wrong with urs ? I have a 1987 chevy v20 put a brand new electric fuel pump and cleaned out tank had someone install it turned and i was able to drive it around just for 10 mins after it wont turn on wont pump gas?
Thanks for the tips. Neighbor has a 92 Silverado that would stall like every 5 minutes. First the pick up coil in the distributor was replaced and truck ran fine for months. Same symptoms again, replace same pick up coil, still shutting down about every 5 minutes. Found out the fuel pump was shutting down. Listened to various videos and replaced fuel pump relay and then oil pressure/fuel switch. Ran for another 5 to 7 minutes and fuel pump stopped running again. Checked ECM for power to fuel relay and had power with key. Pulled relay and powered pump direct with fused 12 volts. Fuel pump ran for 5 to 7 minutes and stopped. Found out that truck was stolen years ago and a remote kill switch for fuel pump was added. A long story now shortened, kill switch was getting hot and interrupted power to pump. Replaced switch with a switch rated for proper amp rating and fuel pump operation now fixed. Patience is key in troubleshooting! Thanks though for the video!
been having same problems as you show on 87 gmc w/5.7 like the way you do the old school test ! worked on my truck got it running thanks for the video!
Thank you! Had the exact same problem on my 02. Your tutorial saved me a tow and mechanic fees.
Thanks for the great video. I seldom subscribe or leave comments but this video was so helpful and informative I was compelled to do both. Great camera work, and perfect and easy to understand explanation of the schematics and troubleshooting process. The split screen description of the circuitry and testing was awesome. I just wish I'd have watched this before going through the hassle of draining 20+ gal of fuel, dropping tank, and pulling apart the fuel pump only to find nothing wrong with the pump.
Thanks for the explanation. I really learn a lot, especially when you do the old school methods. May your New Year be a Good One.
This auto technician is showing us something that is just so valuable. These "methods" are priceless. I am trying to learn auto-electric, and guys like this on Robinson Automotive have taught me so much. He's one of the Best on RUclips.
Mr Robinson you make a very good and INTERESTING instructor. Very clear. Knowledgeable and great use of schematics flow charts. I am a retired Vocational instructor of 30 years. So when I tell you are a very good instructor you ARE!
Thank you means a lot, one day I hope to get back into it like I was, miss it
+r
Autoworld Corporatio
he really would make a nice instructor
I can hear fuel pump at prime and have no fuel at shrader valve on my fuel rail.. Pump and filter have been changed within past couple yrs.. Its got me mad lol. I may have to change pump again.. I held that vavle in and had friend hit key nothing
worked perfect for me !
jumped as shown and old truck started
got a relay at scrap yard and works mighty good !
thanks so much for the advices
This was a fantastic video. My fuel pump in my 89 K1500 wasn't working, and honestly automotive electric kinda scares me. I should have followed your video first, but being daunted by the electrical stuff, ended up replacing the entire fuel pump and assembly first. After that didn't solve my problem, I turned to the oil pressure sensor. Again, didn't fix the issue. Finally, I realized it had to be electrical, which was terrifying for me to deal with. Went back to your video with a new sense of desperation, and tested my relay. The numbers on my relay and yours didnt match since we have different vehicles, but the way they operate is the same, so I was able to match up which ones did what, and ended up successfully jumping it with a short piece of wire. Looks like I'll be buying a $8 relay tomorrow, and the $80 fuel pump and $30 in sensors lets just chalk up to "preventative maintenance"....
Best instructional video EVER! I am restoring a 1987 Chevy K5 Blazer and this video is the reason I was able to drive it from the storage yard to my house. Thank you so much for this video.
Many thanks for the down to earth, old school troubleshooting methods, even though my problems have to do with my fuel tank switching valve on my 87 Silverado, you've given me some food for thought about what else to do. I hope you might have other videos that might relate to that issue as well.
A very good explanation of the fuel system diagnosis. You saved me a lot of headache. Thank You for Who You Are and What You Do
no need to jump a wire to check the fuel pump just turn on the key and listen in the gas filler cap if the pump is working you will her it running then shut off when it builds up pressure lol . most of the time your can hear the pump with out listening in the filler cap. the easiest way to check the relay is have some one turn the key on while you hold your finger on top of the relay . if its good you will feel it click under your finger and most of the time you can also hear the relay click . or you can just do like most do and have a extra relay in your glove compartment and just change it out to see if that was it. 2/3 of the time the modular in the distributor is your problem they cause many problems with starting . the modular controls both spark and makes your injectors in a throttle body system pulse and pump fuel into the injectors . if you have fuel and spark and it wont start check the wires at the injectors if it has fire leave your test light hooked up to the injector wire and turn the motor over the light should go off and on not just stay on all the time. if the light will not come on or go off as you turn the motor over the modular is bad change it and no more problem. the modular took the place of points for fire but also woks to break the fire on and off to the injectors to pump fuel into the motor. the first s10 I had this problem with I changed the fuel pump, then fuel regulator or meter , the injectors, and everything I could think of because I had spark and fuel to the injectors but no fuel would sprat out of them. then some one told me about the modular and what it did .I changed the modular and it was fixed. that was around 20 years ago and since then I have had several do the same thing and its always the modular. now I have hundreds of relays laying around and yes I will pull one out and replace it with another first but if that don't work I go to the modular next !if you run a old car or truck with the throttle body fuel injection system its best to carry extra relays in your glove compartment as well as ether another modular or whole distributor .
I have a 1992 k1500 with the fuel pump relay located on the firewall, I took it off and found that the terminal with the orange wire has no power going to it which is causing the fuel pump not to pump, do you know why there might not be any power going to that terminal?
What exactly do you mean by modular?
Shut up
@@MsSphelpshe means the ignition control module
@@MadAtMax.300Blackout thank you
Hey man thanks my 97 GMC Sierra had the exact issue. Your trouble shooting steps resolved my bad relay issue! Thank you for a great video.
Thank you for your thorough review... In case it helps, simply using another relay with the same value and swapping it out may be faster... If the horn relay is the same, then switch it (sound the horn) and test to see if that is all that is needed... I am sure you know that too. Rafael
Great info. I used this info to determine if mine was out... and it was! Thank you very much for the well thought out and great pace to understanding this problem!
This is an Excellent ! Video and should give anyone watching this series a no fail fix to this particular common problem. Its a Great explanation on how to interpret a schematic for this circuit . It shows how to confirm a good ground using a test light which many people have trouble understanding a ground circuit and its role . My father-in-Law has a 1990 Silverado with this exact problem . I Have Subscribed ! Thank You !
I thought this video was extremely well spoken and clear. im a pretty decent shade tree mech, but I still learn things all the time. ty for sharing. i'll be watching more in the future.
Thanks to your video I was able to fix my '95 G20. It needed a fuel pump relay connector.
Thanks so much for taking your time to educate and help others :)
Thank you, this got my 97 GMC Suburban 5.7 started, a crooked mechanic would have soaked me for a fuel pump!
A fantastic tutorial! Thank you Robinson's Auto! I found my 97 GMC 5.7 would only run on the fuel poured in the carburetor to prime it. After watching this video, I immediately went to the step where I jumpered terminal 30 to terminal 87. I heard the fuel pump start, but the engine would not run. While the fuel pump makes noise, I fear there's trouble with the impeller or something related to the fuel pump. I guess the next step is to verify fuel pressure at the manifold. This is going to be a little more difficult to do as I'm not equipped to do so. I hope I can find enough parts to assemble a test gauge.
A loaner gauge from AutoZone showed 14 PSI at the fuel rail by the throttle body. Looks like it's time for a fuel pump. I have a new pump assembly in hand. Will also replace the fuel filter. As the tank had just been filled to the top when the pump failed, I'm not looking forward to dropping it. I'm not looking forward to raising the bed either. I'm going to cut an access hole in the bed of the truck. I like that simple approach. It's an older truck, and I can make a nice access cover.
The access hole in the bed of the truck is the way to go! Be careful with dimensions that you find online. I found two different sets of dimensions and both were wrong. Following them would have given me a useless hole looking at the top of the fuel tank where there is no fuel pump access. I determined my own access hole location. It was very close but I had to enlarge it slightly once the hole was opened. Contact me directly if you would like my dimensions for a '97 GMC Sierra SL. 8-foot bed. C2500. 3/4 ton. High GVW. 8400 lb GVW. 34 gallon fuel tank. I'll be glad to forward you the dimensions for the hole location. The most difficult thing about changing the fuel pump was loosening the fittings when the lines transitioned from steel to rubber. For details how I was successful, feel free to contact me as well. Perhaps I'll make a video someday.
One of the better how to videos I've seen great job. I am not a mechanic at all but I can follow what you say to do!
Ab-Ra-Fricking-Ka-Dabra!
Just like that. Thank you kind Sir. I was raised by a mechanic and you just changed my life with your explanations of what-wire-does-what on a relay and MORE!
Thank you. Thank you. Thank you.
Dang Man, that was an outstanding video. Can't wait to watch the next one with the oil pressure switch troubleshooting. I also need to go to beginning as I don't recall if the fuel pump was cycling. My 88 K2500 is cycling but I did notice the oil pressure build slow and the voltage looks like its taking a big hit during attempting to start. This all began on a cold snap and my opportunities to evaluate have been limited. This will give me some possible options to analyze tomorrow. Natural born teacher you are indeed. Great job!
Ñn bff
Excellent video. I was just getting ready to get under my 95 Silverado and check the fuel pressure. I will have to watch this a few times to understand the circuits but excellent explanation.
Great video man... Thank god for you and thank god for the Internet you just saved me a whole bunch of time and labor ... I could have swore my fuel pump was bad... Turns out I had the same issue... Bad relay... Thanks again
Took me 2 days figure it out, replaced ICM, and fuelcut/ oil pressure switch no issues since.
Wish woulda found your channel, but was a good learn of my trucks systems for me.
im just going into this with my vehicle and wanted to say thank you for such awesome info.
Excellent video. Relays do go like mine did on my GMC. Saves lowering tank and replacing pump only to find it was the relay.
Good work mate, using basix tools that anyone would have. Just what I needed as I don't know anything about automotive electrical repairs. All the best from Australia. 🙃
Thank you! Your video helped me diagnose that the priming circuit was not working in the relay. You saved me a bundle!! Merry Christmas!
Hay that’s one of the best videos on UTube and this guy knows his stuff thanks you for be clear about ck before you give to the customer 👍👍👍
I really enjoy watching these videos I like the way you explained the diagnosis,
also I like the way you troubleshoot it, and challenge the viewer on what to do next,
I think that is so cool, so I hope you are still making videos I really enjoy them thank you, for your help,
Excellent video. Very informative and demonstrated in a way that anyone could follow along. Just an excellent video Sir. Thank you very much
Really well done and you may have saved me a lot of work! My symptoms are very similar and I was about to drop the tank this weekend to replace the pump. I'll now run through your instructions to verify I am getting correct grounding and supply voltages. Thank you very much for creating this video!
Fantastic help there Bud, so simple ,love the old school because your right I have basic tools and no money
Thank you for your informative video! I'm sure to advance my mechanical aptitude with your thorough step by step tutorial. Much respect and gratitude for your service. Thank you sir.
He is really clear and understandable in all his explanations.
Thank you for an awesome video. No b.s. just straight up explanation. I can't wait till tomorrow morning to go out and check that relay.
Many thanks. The video was very informational and easy to understand.
I like the fact that it was kept simple.
Thank you for your video, your narration makes it easy to understand and very helpful for doing the job myself, thanks again
i did the same thing he did with relay but my truck wouldn't start. Ran out just like he said only to find out that my relay was good. So it must be the B1 sensor oil pressure switch. This guy is good. Thumbs up from Detroit.
thank you! especially for the old school ways for us that don't have all the tools on hand. :)
Really helpful. I appreciate your patience when showing what was going on.
I wish I watched this video earlier I bought all new battery, alternator, and starter still didn't resolve my problem. I want to thank you for this video very helpful you explained everything I needed to know very well
Best damn trouble shooting video I have ever seen and it has solved my problem. Thanks a lot
Great info. video! I enjoyed watching and learning from this. You explain all so clear and with captivating ability. You should be an automorive instructer. I learned some things, thank you much Mr.
👍🏻👍🏻
Thank you for the kind words and feedback! That was a dream of mine. Not sure if it will ever happen but I truly enjoy sharing my knowledge on here. It’s my way in a way lol
stumbling across this has given me new hope!!!!!
Best instructions video I ever watched this man is the real deal
Thanks amigo very good explanation now I know what is the problem with my chevy 94 long life to you my friend grasias thanks again
very well done - my hat off to you !
Man are you sharp on things, I used this and it worked. thanks 1989 chevy truck cheyenne
AWESOMMMMEEEEE!! Thank you so much for the in depth video.
Liked. Favorited. Subbed.
Great Video Mr Robinson Thanks for keeping it old school. It helps a lot.
Great tutorial! Thanks! I had a problem with my chevy venture where it wouldn't start. I tried spraying in starting fluid into the air intake and it briefly started. It sounded like the fuel pump energized. So I replaced the in-line fuel filter and it started ok.
Excellent video Will, You really make it clear what to do, keep up the good work.
What a great video, I am impressed with your troubleshooting!
this video helps alot gmc, chevy trucks like dtc 54, is a problem with lots of people changing dtc 34 (map) and dtc (43) when you get a dtc 54 check your fuel relay and your oil pump switch these two work together that's way you get a carking bout no start, ,dtc 54 says fuel pump circuit fault or mixture control but won't say check your oil pressure switch. but some people think it's the fuel pump (some times)..
I really like the way you explain things, very helpful, thanks
that was a great educative video , thank you for the time and effort to teach us all on thuis subject matter , i have a friend i have been helping since today : he owns a working pickup truck made : Chevrolet , yr 1990 , class K1500 , Eng : 4.3L V6 , last week i helped him replace entire front differential and axles with new upper arms and new sway bar adapters and replaced shocks with new to size ( the mechanic cheated him by installing cheap grade P 70 , rather P125HE recommended ( this made the vehicle drive with no problems ) , today ? he was driving and suddenly the truck choked and died out ,
symptoms : it cranks but wont start ,
checked : fuel pump, fuel pressure , sparks , distributor , distributor modules , spark plugs , wires : all came negative : working fine .
EGR : working fine .
cam valves : i checked them through view point of Engine oil cap off , they are cranking fine .
the Question : what do you think in your experience causing it not to start ? i am thinking it has to do with compression ?
Absolutely fantastic video, I think you could be an ivy league professor if wrenching doesn't work out haha !
Thanks very much for sharing, and teaching!
Thank you so much for this video. You just save me so much time and money.. my issue was the relay..
Excellent Instruction video! I really enjoy your videos. Please keep them coming.
thanks bro this video was so very helpful ....after switching the tank and fuel pump i see this video and fixed my problem thank u very much u will be blessed
christian nieves what was ur problem
Great video. Big help. Thanks for the walk through of the fuel system
Very good and informative video. Easy to understand. Thank you kind sir!
Man... YOU HAVE NO CLUE... How much help you have been to me! That is exactly my problem! Going straight to Autozone and buy that part! Yayyyy... ;) YOU ARE AWESOME! My hero literally!
Very good video. Thank you for going step by step through the diagnostic process. Regarding the oil pressure switch mentioned at the end of the video - I believe that is to cut off the power to the fuel pump should you lose oil pressure to avoid catastrophic engine failure rather than provide an alternative power supply to the fuel pump should the relay fail.
thanks for the video it saved my ass today. my module still works was very badly corroded on one prong cleaned it and got it going again.
great explanation Brother. I wish you were my mechanic. Thank you
You are in my books a true professional/ Your video was very thorough yet to the point. You taught me a lot in a little time. And I thank you sir, for not wasting my valued time. I will be sure to subscribe to your channel and look forward to learning more from your videos. And ma God bless you and those who you hold near and dear to your heart and soul.
Great thorough explanation . If stuck on the road with no tools , you could swap another relay with the same number of pins . If you had to hike to the parts store , you could buy a relay if no other one is available . And also some brake cleaner . Give it a small amount of brake cleaner through the air intake . Obviously , if it runs there is an issue on the fuel side and not a spark problem . That oil pressure switch is also good to check . I don't believe there is a Schrader valve on any GM TBI systems to check fuel pressure . Thanks .
Thanks for taking the time to go step-by-step. Peace ~ d2
Great video, informative and easy to follow. Thanks!
Thank You for taking it all the way through the process
Thx for the video and good information I just got a 1988 Chevy Silverado I'm trying to figure the problem similar to this crank no start carb Thanks! Gave me good idea where to start.
Excellent teaching and video work!! Thank you for having NO music or fowl language!! No wonder you have so many subscribers!