@@michaelsoutherland3023 Yes, perfect fit for that. There's generally a good reserve of vacuum anyway for that. As a kid I sometimes drove the 1936 Chevy flatbed truck. It had vacuum windshield wipers and a vacuum actuated 2 speed rear axle, and the engine was so clapped out it hardly made any vacuum at all. The axle was a nightmare, you had to double-clutch it to get it to shift and it only would shift with enough vacuum which could only happen when you were letting off the accelerator. Lots of grinding. The wipers always stopped in front of the driver's face.
Thank you! My dad used to fix everything for me, since he passed I've had to try and be dad and grandpa for my girls. I use your videos all the time to diagnose and fix our cars. Thank you so much! (Currently dealing with an issue I believe fuel related with a 2018 Trax)
you go mom its a much more difficult thing your doing than anyone could imagine and as an ol man i will say and offer any help i can as a stand in in that way please its a hand up not out and i would be proud to help ya carry the load or give ya a break in some way, and you owe me nothing in return but a thanks n a smile and i admire you my mom was like you and i watched it wear on her and thats why i make this offer again you wont owe me its what i owe already so dont be to proud to take it it would be me who would be remiss if i didnt offer with out any expectations of any kind but that smile and a thax its worth a million more than a buck was ever
Your dad sounds like real man..I know my dad was a piece of shyt añd my step dad knew about cars but hated that I wanted to learn but I wasn't his kid lol daddy issues but im on you tube as well
@@johnnychronicles3221 my dad was a real man, he knew how to do everything and was so very loving. I'm sorry your dad wasn't a better father and that your stepdad didn't step up. The man I'm speaking of was actually my stepfather legally, but he was my father and raised me and loved me like I was his own. Yes, I know how blessed I was/am. :)
Being a single mom having to be MOM and dad for my two boys and one girl, I have tried to cover teaching the "mom" things and the " dad " things that children learn from having two parents in the home. Your instructions have made this mom look like WONDER WOMAN to my kids when our vehicles have a case of the blues! You have our respect and appreciation for your work and instructions. Rock on man! Thank you
you know, it's funny that I knew you had this video, but I forgot it was tested with your C4 Corvette. I bought a C4 Vette a couple days ago, and that car is the reason I return to this video over 6 years later.
Thank you i just bought a 1994 corvette a week a go. Been driving it make popping noise under the hood lack of power. I tested 40 psi then drop to 0 in a sec ? I follow your video here then I replaced the fuel pump to day. what a difference it made no lack of power full power back. Thank you for all the steps in the videos it helps :-)
Your videos are extremely helpful to me. I struggle processing because of head injuries and the way you take the time to explain things I know I knew before you help me to be successful. Thank you sir. God bless you
I like how this man is straight to the point and he let you know everything what could done with it how many he doesn’t just go to the point he goes above and beyond and it makes it extremely helpful ! Thank you so much young man
I watched several videos on this topic and yours was by far the easiest to comprehend. You did an excellent job illustrating the system and then providing clear and concise direction and rationale for each step along the way. I'm fixing (trying to anyway) my son's car that just died on him while driving. I just bought a fuel pressure gauge and now have some confidence to use it after your video. Thanks.
@@chrisfix Hey Chris where should I connect if my truck doesn't have a Schrader valve? I have a test kit with a T and I'll grab some fuel lines so I can do an engine on and off test, but not sure where in the fuel rail I should connect to? I have a 1985 Ford F150 with the 5.0L V8 EFI.
Very good instruction up to 4:50 mins - I quote: "vacuum decreases on acceleration NOT increases", as stated in the video. Thanks for all the great videos that you post on RUclips ... Top Gun!
I agree. The greatest vacuum occurs at idle. The vacuum pulls the diaphragm to open the fuel pressure regulator which allows excess fuel to return to the fuel tank. As the engine accelerates, the vacuum decreases and the pull on the diaphragm decreases moving the fuel pressure regulator toward closed maintaining adequate fuel pressure. That is my understanding.
Vacuum does decrease upon acceleration, that's what my vacuum gauge shows which I monitor all the time when driving. The highest vacuum tends to be at idle, but it will get even higher when you let the car coast downhill, decelerate on a slope by momentarily letting off the gas pedal. You can buy a 'fuel economy gauge' which is just a glorified vacuum gauge. It's very helpful to monitor it while driving in order to minimize fuel consumption in an engine. You ideally want to keep the vacuum as high as possible at all times for best economy.
@@nathangant7636 Intake manifold vacuum is high when the throttle plate is closed at idle. If you increase the rpm, by opening the throttle plate, the vacuum will decrease. To your point, intake manifold vacuum will be at its highest when both the engine RPM is high AND the throttle plate is closed like when you initially take your foot off of the gas pedal at a high rpm. That highest degree of vacuum is momentary. That is my understanding.
I always enjoy the information that you impart to others. No BS straight to the point in layman's terms and always to the point. I have a classic car, 38 years old and you have helped me beyond words in the last month alone. Chris you have also instilled a degree of confidence to tackle a maintenance task that I always thought beyond me. All the way from Scotland I therefore wish you a very long and happy life my heart felt thanks Gordon.
Enjoyed your video. Very well done. I would like to point out that you did explain how the Fuel Pressure Regulator works a bit backwards. The regulator's diaphragm is actual opened more by the higher vacuum transferred to the diaphragm via the vacuum line at idle than when the engine accelerates or operates at higher RPMs. This happens because as the throttle opens the air restriction that forms the vacuum in the air plenum. As the addition air is let in from the air intake it increases air flow and reduces the vacuum. This reduces the vacuum to the regulator allow the regulator to close off more of the fuel that was otherwise allowed to pass back to the gas tank. This increases the available fuel and pressure in the fuel rail allowing the injectors to deliver more fuel to the engine. Just a bit technical but I think it helps explains to those that might have been confused as to why the pressure on the gauge actually goes up when you unplugged the regulator's vacuum line at idle. This is what causes that to happen.
@@chrisfix want to clarify with you at the end of the video how to know how to test if the fuel pump is leaking fast or if fuel injector is leaking slow (how to test?). By watching the fuel pressure gauge when shutting the car off?
Thanks, Chris, a brilliant tutorial with nothing left unanswered. I've always wanted to know how to check the fuel pressure but imagined it to be all a bit too complicated. Now I've got a firm grasp of how to do it alongside how to diagnose problems and fix them. Thanks again.
Thanks for making this video! You helped in diagnosing my brother's car. His fuel pressure regulator was allowing gas to pass into the intake manifold, thereby flooding the engine and preventing the car from starting.
Whoa, this may have been the best of your vids for me. Most are good process review for me, but this one had far more educational info than I expected. I hesitantly had a shop do a 'diagnosis', but didn't watch and knew they were just throwing parts (his answer was two unrelated items and dismissed my question of fuel pump), not only do I now know the process, but you answered my two follow up questions, about injector seal and pressure regulator. Now anyone in here knows how to troubleshoot more than most shops (out here at least they just throw parts, it's not their money).
Dear Chris, You certainly have the gift of being an excellent teacher. Watching your videos is one of the best ways to learn for the do it yourselver . Thank you for all the superb tutorials you produce.
Great vid. Clear cam and views, clear sound, no background disturbing noises....you do care for your audience Chris. What you want to demonstrate hits its max. ! Thanks for the great work.
This has got to be the BEST DIY fuel system check ive ever seen online. Very clear, high quality video, smart guy. Covers physically the fuel injectors, fuel pressure testing, fuel pump information/testing, valve pressures. No wonder you got almost 2 million subs, nice work !! and thanks!
Very clear and concise description of diagnosing fuel issues in FI vehicles. And, btw charlie c, that's 5.3 million subscribers now! Plus one (me). Thanks Chris!
but he is so wrong when he explaind the vacuum hose in the fuel regulator, he knows very well what it does and how it works, but he is not explaind it correctly
Chris you cost me a lot of time and money. I had to hunt for a year to find a nice 96 like that one ! Well almost, I got the manual LT4. Thanks for your awesome work !
This is super detailed, I love how you show close ups and explain everything. I'm mechanically inclined but not with vehicles. (More metal work, etc) But I need to do some basic work and tests on my Jetta, this is a big help. Thank you!!!!
I always knew possible problems in cars. Thanks to you I know much better ways of testing for specifics. Extremely helpful to us Houston guys dealing with heat and traffic wearing on our cars
Awesome video. I was able to narrow it down to the fuel pressure regulator and solve a problem that had been causing me headaches for a couple years. Bad idle and super low mileage. Thanks!
You can hear it jn his voice from then to now how much we have supported this guy. 2013 " hey its chrisfix and this is our problen today" 2019: "HEY GUY'S IT'S CHRISFIX AND IM HERE TO SHOW YOU MY ENTIRE LIFES KNOWLEDGE TODAY"
This guy is great, every car fix video I watched of his absolutely covered every thing I was looking for, and each video on how to do the repair was easy to follow from beginning to end .The video on fuel pressure check fixed my mazda protege once I found out it was my pump. Any of the other guys videos where ok if you wanted to watch it 6 or 7 times . Great job man !! And thanks for saving me a load of money.
@@johnalbertson79 you make it sound like he doesn't matter, just the information, no one cares how he sounds, but we do care that he is alot happier, and more confident
What a helpful and insightful video! Thank you. I have a running rich code on my BMW and have ruled out MAF sensor and O2 sensors. This is my next step and thanks to you I have an easy to follow diagnostic test without having to pay shop $250+
Thanks Chrisfix for another fantastic video. Since I have subscribed over a year ago I have really learnt a great deal from your videos! Thank you for sharing your knowledge with others
yes, I did have low pressure and starting issues, I feel foolish because the filter has about 25k on it and I change my oil every 2000. Im thinking a dirty filter. I plan to keep a gauge on and test for a week. No doubt pump is weaker than a new one but then with a dirty filter compounded the problem. Ive learned alot though by trying to diagnose the problem. Videos like yours sure help.
Your video is awesome and very detailed, but just a quick note When you accelerate vacuum goes less not more and when you're at idle vacuum goes higher, most vacuum occurs when you first decelerate , means when you just let off the gas pedal you get your highest reading of vacuum and lowest pressure in your intake manifold
@@chrisfix I attached my fuel pressure regulator gauge to the fitting on the fuel rail.. turned the key to accessories (on not run) and I had no movement from the gauge..it was running fine the quit.. started choking down when I gave it gas...fuel pump comes on..turns over but won't crank..I'm assuming that it's the fuel pressure regulator..am I right?
Very helpful and educating .... Now i can check wife's car that is starting intermittently. Starts fine and sounds like will stall and all of a sudden it runs. I am suspecting fuel delivery issues. When gas pedal pressed it starts right away. Will start with checking basic stuff. Thank You
Whom it may concern I had a Chevy truck I was working on for my neabour 1998 it had 58 psi.when you crank it no start it would hire when you turned the key back it hit and the fuel presser would jump to 63 ..I thought I was going to have to junk it you would of thought it would have ran but No ..Well I put a new pump in from G.M. and fixed it how about that guys..Let me know if you read this this kind of jobs will make a mechanic go to Wallmart..
you are the man!! you are doing a great job.. thank you for being such a great teacher... keep on doing a great job!!!! Happy Holidays.... A holler from Russia :P
Your tutorials are extremely concise, to the point, and very helpful with no wasting time or bs. Great filming of your work as you do it as well. I will continue to watch your vids and recommend you to friends. Thanks ChrisFix
4:40 I think you made a mistake. At idle, vacuum is highest. When accelerating, vacuum is less. That's why when you disconnect the vacuum line, it simulates high throttle.
I also have dyslexia and I'll say the opposite of what I mean. There are 2 types of dyslexia I believe, one is for incoming information like seeing letters backwards when reading. The other type is out going information like giving directions, explaining something, or writing letters backwards. It's frustrating because you know what you mean to say but it literally comes out the opposite.
@John Smith giving directions is always fun. It's weird because i dont try to go the wrong way if I'm driving. I guess it has a disconnect and only effect speech. Shit is weird, it was alot worse when I was younger.
the needle shouldn't move that much on a snap way to much I would throw your low amp clamp on the fuel pump circuit and count your humps I bet it around only 3000 rpm I bet there is a miss on hard acc
Chris ur videos r great ive used ur videos so many times I used this video too see if my fuel pump was bad thanks for the great video u have the best channel on utube for fixing cars
Hi Chris: I'm confused, I've watched a dozen videos on this subject and just when I thought I understood how it works...you tell me that it's to the opposite of what I understood....I thought that in an idle situation vacuum in an engine is at it's highest level..(throttle plate closed) and this high vacuum opens the fuel regulator to the max because very little fuel is needed so what is not used is returned to the tank. When the engine is accelerated (throttle plate open) vacuum falls off and fuel consumption increases and to maintain the pressure the lower vacuum lets the fuel regulator close to maintain the pressure in the fuel rail. I have a problem with a 2001 Santa Fe 2.7 GLS and I'm far away from scanners and vacuum pumps. That's the reason I'm watching so many videos....I'm not saying that you are wrong or not try to be smart...I just need to know.
He does have it backwards, when the throttle is closed is when you get the highest vacuum. I'm old enough to remember vacuum operated windshield wipers that would quit when giving the engine more gas plus he showed high vacuum when he unplugged the fuel rail regulator at idle.
Did you ever find the fix to your problem? I also have a 2001 Santa Fe GLS 2.7 and it has a very hard time starting, always. When it does start it runs perfect though.
Fantastic videos and diagnostics, but vacuum drops when the throttle is open. Just a lil fyi. Easy peasy. Thanks for the videos. Me and my roomie are watching your videos just to gain some knowledge
Thankyou for all the videos you make man i greatly appreciate it! Your videos are the best quality and you make complex systems easy to understand which is a hard thing to do.
The video is fantastic! I think you misspoke at one spot though, Chris. You said that engine creates more vacuum at higher rpm and it lowers at low rpm. It is right the opposite and thats why the pressure regulator works the other way around you explained.
Oh God please no! I already had this happen on my Camaro years ago. Removeing the pump on GMs F-body sucks. Funny because I watched that video after you uploaded it. Thanks for the reply!
yeah.. I have a minivan here with a similar problem and the sender stopped working properly miles back... time for a whole pump assembly and man! they aren't cheap
Accelerating = lower vacuum. Decelerating = higher vacuum.
Is that why the brake booster runs off vacuum ? ;)
@@michaelsoutherland3023 Yes, perfect fit for that. There's generally a good reserve of vacuum anyway for that. As a kid I sometimes drove the 1936 Chevy flatbed truck. It had vacuum windshield wipers and a vacuum actuated 2 speed rear axle, and the engine was so clapped out it hardly made any vacuum at all. The axle was a nightmare, you had to double-clutch it to get it to shift and it only would shift with enough vacuum which could only happen when you were letting off the accelerator. Lots of grinding. The wipers always stopped in front of the driver's face.
Thank you! My dad used to fix everything for me, since he passed I've had to try and be dad and grandpa for my girls. I use your videos all the time to diagnose and fix our cars. Thank you so much! (Currently dealing with an issue I believe fuel related with a 2018 Trax)
you go mom its a much more difficult thing your doing than anyone could imagine and as an ol man i will say and offer any help i can as a stand in in that way please its a hand up not out and i would be proud to help ya carry the load or give ya a break in some way, and you owe me nothing in return but a thanks n a smile and i admire you my mom was like you and i watched it wear on her and thats why i make this offer again you wont owe me its what i owe already so dont be to proud to take it it would be me who would be remiss if i didnt offer with out any expectations of any kind but that smile and a thax its worth a million more than a buck was ever
Gotta love that
Your dad sounds like real man..I know my dad was a piece of shyt añd my step dad knew about cars but hated that I wanted to learn but I wasn't his kid lol daddy issues but im on you tube as well
@@TheEdiphone Thank you so much! I really appreciate that!
@@johnnychronicles3221 my dad was a real man, he knew how to do everything and was so very loving. I'm sorry your dad wasn't a better father and that your stepdad didn't step up. The man I'm speaking of was actually my stepfather legally, but he was my father and raised me and loved me like I was his own. Yes, I know how blessed I was/am. :)
The progress this man has made in 8 years is impeccable
He went from this to. Super stardom lol
0⁰⁰
@@ivanvalentin3898😊😊😊
Even in this he is still better than most channels
Being a single mom having to be MOM and dad for my two boys and one girl, I have tried to cover teaching the "mom" things and the " dad " things that children learn from having two parents in the home. Your instructions have made this mom look like WONDER WOMAN to my kids when our vehicles have a case of the blues! You have our respect and appreciation for your work and instructions. Rock on man! Thank you
you know, it's funny that I knew you had this video, but I forgot it was tested with your C4 Corvette. I bought a C4 Vette a couple days ago, and that car is the reason I return to this video over 6 years later.
That "hey guys" is the most chill intro I've ever heard from ChrisFix! Love this classic!
2013 : hey guys chris fix here..... 🌧️
2019 : HEY GUYS CHRIS FIX HERE!! 🎶☀️
Ha ha, noticed the same thing. He is much happier now =D
@@tupapirafa thats because he only had about 100K Viewers back in 13'. Now hes in the millions making that big bank $$$. I'd be happier too!
Legit
upjw
:-D
Thank you i just bought a 1994 corvette a week a go. Been driving it make popping noise under the hood lack of power. I tested 40 psi then drop to 0 in a sec ? I follow your video here then I replaced the fuel pump to day. what a difference it made no lack of power full power back. Thank you for all the steps in the videos it helps :-)
Your videos are extremely helpful to me. I struggle processing because of head injuries and the way you take the time to explain things I know I knew before you help me to be successful. Thank you sir. God bless you
I like how this man is straight to the point and he let you know everything what could done with it how many he doesn’t just go to the point he goes above and beyond and it makes it extremely helpful ! Thank you so much young man
I watched several videos on this topic and yours was by far the easiest to comprehend. You did an excellent job illustrating the system and then providing clear and concise direction and rationale for each step along the way. I'm fixing (trying to anyway) my son's car that just died on him while driving. I just bought a fuel pressure gauge and now have some confidence to use it after your video. Thanks.
Great! Glad my videos are helpful! Any check engine lights? Feel free to ask as many questions as you want and I will try to help!
@@chrisfix Hey Chris where should I connect if my truck doesn't have a Schrader valve? I have a test kit with a T and I'll grab some fuel lines so I can do an engine on and off test, but not sure where in the fuel rail I should connect to? I have a 1985 Ford F150 with the 5.0L V8 EFI.
Very good instruction up to 4:50 mins - I quote: "vacuum decreases on acceleration NOT increases", as stated in the video. Thanks for all the great videos that you post on RUclips ... Top Gun!
Throttle closed at idle higher vacuum, wide open throttle lesser vacuum
I agree. The greatest vacuum occurs at idle. The vacuum pulls the diaphragm to open the fuel pressure regulator which allows excess fuel to return to the fuel tank. As the engine accelerates, the vacuum decreases and the pull on the diaphragm decreases moving the fuel pressure regulator toward closed maintaining adequate fuel pressure.
That is my understanding.
Vacuum does decrease upon acceleration, that's what my vacuum gauge shows which I monitor all the time when driving.
The highest vacuum tends to be at idle, but it will get even higher when you let the car coast downhill, decelerate on a slope by momentarily letting off the gas pedal.
You can buy a 'fuel economy gauge' which is just a glorified vacuum gauge. It's very helpful to monitor it while driving in order to minimize fuel consumption in an engine. You ideally want to keep the vacuum as high as possible at all times for best economy.
@@nathangant7636
Intake manifold vacuum is high when the throttle plate is closed at idle. If you increase the rpm, by opening the throttle plate, the vacuum will decrease.
To your point, intake manifold vacuum will be at its highest when both the engine RPM is high AND the throttle plate is closed like when you initially take your foot off of the gas pedal at a high rpm. That highest degree of vacuum is momentary.
That is my understanding.
I always enjoy the information that you impart to others. No BS straight to the point in layman's terms and always to the point. I have a classic car, 38 years old and you have helped me beyond words in the last month alone. Chris you have also instilled a degree of confidence to tackle a maintenance task that I always thought beyond me. All the way from Scotland I therefore wish you a very long and happy life my heart felt thanks
Gordon.
Enjoyed your video. Very well done. I would like to point out that you did explain how the Fuel Pressure Regulator works a bit backwards. The regulator's diaphragm is actual opened more by the higher vacuum transferred to the diaphragm via the vacuum line at idle than when the engine accelerates or operates at higher RPMs. This happens because as the throttle opens the air restriction that forms the vacuum in the air plenum. As the addition air is let in from the air intake it increases air flow and reduces the vacuum. This reduces the vacuum to the regulator allow the regulator to close off more of the fuel that was otherwise allowed to pass back to the gas tank. This increases the available fuel and pressure in the fuel rail allowing the injectors to deliver more fuel to the engine. Just a bit technical but I think it helps explains to those that might have been confused as to why the pressure on the gauge actually goes up when you unplugged the regulator's vacuum line at idle. This is what causes that to happen.
Pete Owens Thanks Pete for the clarification. I misspoke when I made the video (I said the opposite without even realizing it).
@@chrisfix want to clarify with you at the end of the video how to know how to test if the fuel pump is leaking fast or if fuel injector is leaking slow (how to test?). By watching the fuel pressure gauge when shutting the car off?
man 8 years ago you was very cool. now at 2021 now you re pumped and hype. i like the update to your disposal.
Thanks man!!!
@@chrisfix Ye man no problem. Love ur vids and u too
Fantastic demonstration, right to the main points. No extra talking. Great job
10 years and still relevant this man is a legend.
Thanks, Chris, a brilliant tutorial with nothing left unanswered. I've always wanted to know how to check the fuel pressure but imagined it to be all a bit too complicated. Now I've got a firm grasp of how to do it alongside how to diagnose problems and fix them. Thanks again.
Thanks for making this video! You helped in diagnosing my brother's car. His fuel pressure regulator was allowing gas to pass into the intake manifold, thereby flooding the engine and preventing the car from starting.
***** Great! Glad the video helped you and thanks for letting me know!
i wish Chris was my neighbor
I’ve said this for 10 years now wish I could have him as a mechanic
Whoa, this may have been the best of your vids for me. Most are good process review for me, but this one had far more educational info than I expected. I hesitantly had a shop do a 'diagnosis', but didn't watch and knew they were just throwing parts (his answer was two unrelated items and dismissed my question of fuel pump), not only do I now know the process, but you answered my two follow up questions, about injector seal and pressure regulator. Now anyone in here knows how to troubleshoot more than most shops (out here at least they just throw parts, it's not their money).
Clearest explanation I’ve seen so far. Nice job!!!
Dear Chris,
You certainly have the gift of being an excellent teacher. Watching your videos is one of the best ways to learn for the do it yourselver . Thank you for all the superb tutorials you produce.
Great vid. Clear cam and views, clear sound, no background disturbing noises....you do care for your audience Chris. What you want to demonstrate hits its max. ! Thanks for the great work.
Best videos I’ve seen on RUclips. Thanks
This has got to be the BEST DIY fuel system check ive ever seen online. Very clear, high quality video, smart guy.
Covers physically the fuel injectors, fuel pressure testing, fuel pump information/testing, valve pressures.
No wonder you got almost 2 million subs, nice work !! and thanks!
Very clear and concise description of diagnosing fuel issues in FI vehicles. And, btw charlie c, that's 5.3 million subscribers now! Plus one (me). Thanks Chris!
but he is so wrong when he explaind the vacuum hose in the fuel regulator, he knows very well what it does and how it works, but he is not explaind it correctly
He is number one make me proud to have a little skill level at my age.
I agree this dude explained it very well 👍
WELL DONT BE GOING OUT JUST OPENING FUEL LINES ON CARS, BECAUSE MOST NEW CARS HAVE HIGH PRESSURE FUEL UP TO 2000PSI...SO
I am 65 and very glad you do these movies to show us how to do it right. Thanks Bob
Robert Thacker Thanks a lot Bob!
Bro!!! I have seen probably every video that you put up! You're the man! Keep it up.
I wish we were related or neighbors. You are brilliant. Thank you for taking the time to explain by including the intent of it.
1:31 we finally get to see what Chris Fix looks like !
Chris you cost me a lot of time and money. I had to hunt for a year to find a nice 96 like that one ! Well almost, I got the manual LT4. Thanks for your awesome work !
Thanks for posting this! Great video quality, easy to understand. Going to be testing my pressure on my boat this weekend!
Tanks so much for the ideas on my 2012 caravan!!! I think I can fix it!! fingers crossed!
This is super detailed, I love how you show close ups and explain everything. I'm mechanically inclined but not with vehicles. (More metal work, etc) But I need to do some basic work and tests on my Jetta, this is a big help. Thank you!!!!
Jena Pantano hey
Outstanding. Precise, clear, useful, informative, and well produced and edited.
Thanks!
Another well thought out instructional video.Straight to the point,excellent camera work and editing of the video.
Thanks!
I always knew possible problems in cars. Thanks to you I know much better ways of testing for specifics. Extremely helpful to us Houston guys dealing with heat and traffic wearing on our cars
I'm glad you found my video helpful! That's what I aim for!
Clear, concise, excellent video on the topic. Thanks
Thank you! That's my goal and I am glad you enjoyed the video!
Awesome video. I was able to narrow it down to the fuel pressure regulator and solve a problem that had been causing me headaches for a couple years. Bad idle and super low mileage. Thanks!
jjpski AWESOME! Glad the video helped!
You can hear it jn his voice from then to now how much we have supported this guy. 2013 " hey its chrisfix and this is our problen today"
2019: "HEY GUY'S IT'S CHRISFIX AND IM HERE TO SHOW YOU MY ENTIRE LIFES KNOWLEDGE TODAY"
None of that matters in the end. It's about the knowledge and whether or not it's accurate and reliable. I don't care if he sounds chipper or not.
lol
This guy is great, every car fix video I watched of his absolutely covered every thing I was looking for, and each video on how to do the repair was easy to follow from beginning to end .The video on fuel pressure check fixed my mazda protege once I found out it was my pump. Any of the other guys videos where ok if you wanted to watch it 6 or 7 times . Great job man !! And thanks for saving me a load of money.
@@johnalbertson79 you make it sound like he doesn't matter, just the information, no one cares how he sounds, but we do care that he is alot happier, and more confident
What a helpful and insightful video! Thank you. I have a running rich code on my BMW and have ruled out MAF sensor and O2 sensors. This is my next step and thanks to you I have an easy to follow diagnostic test without having to pay shop $250+
Hey how did you fix your rich code on your vehicle? can you tell me your solution?
Thanks Chrisfix for another fantastic video. Since I have subscribed over a year ago I have really learnt a great deal from your videos! Thank you for sharing your knowledge with others
Bro this is the most well educated well informed video on a C4 I've ever seen!!! Kudos to you👍👍👍
Excellent Video extremely helpful, Keep up the great work. Will definitely come back for help when required.
yes, I did have low pressure and starting issues, I feel foolish because the filter has about 25k on it and I change my oil every 2000. Im thinking a dirty filter. I plan to keep a gauge on and test for a week. No doubt pump is weaker than a new one but then with a dirty filter compounded the problem. Ive learned alot though by trying to diagnose the problem. Videos like yours sure help.
dougjamesvandals Dont feel foolish. My fuel filter has 300k miles on my van haha. Definitely keep me posted!
One thing you said is backwards.... When the throttle is opened you will have less vacuum, When closed you will have more vacuum. @4:53
@Gary Hardin
Txs a lot (sarcas) - noW u just confused me. Every1 makes mistakes, but i dont already have rigorous auto
@Gary cont'd..
...tech training background, like some of the other viewers. Trying to learn how vacuum and engine
Gary Hardin when the trottle is full open the RMP go up and the engine need more air and the vacuum come from intake manifold think about it,,
Correct...
Dorks
Chris, you are a big help to any Mechanic
pro or amateur. thank you.
Man your tutorials are excellent! Subscribed!
Thanks for the comment and I will be publishing more how-to's every week or so.
It’s amazing to see how much you have changed since 2013
Your video is awesome and very detailed, but just a quick note When you accelerate vacuum goes less not more and when you're at idle vacuum goes higher, most vacuum occurs when you first decelerate , means when you just let off the gas pedal you get your highest reading of vacuum and lowest pressure in your intake manifold
Mostafa Haridy Thanks and yes, I mispoke. Thanks for the info!
Thanks, Chris.
Even though I have a different vehicle, you have covered the basics very well!
Very good video went straight to the point without all the talking 😅
Awesome video!! You got skills!!
***** Thanks man!
@@chrisfix I attached my fuel pressure regulator gauge to the fitting on the fuel rail.. turned the key to accessories (on not run) and I had no movement from the gauge..it was running fine the quit.. started choking down when I gave it gas...fuel pump comes on..turns over but won't crank..I'm assuming that it's the fuel pressure regulator..am I right?
El buen y locochon Chris Fix un muy buen compa 👍👍👍👍👍👍
You sir are a Car Guru Genius. But how about vehicles without a fuel pressure regulator like a 99-04 Mustangs?
One of the best videos I've seen on troubleshooting a particular subject. Informative, concise, great video quality, great commentary, great job!
I suppose only an electronic fuel pump makes that sound.
That's one beautiful Corvette. Wow, I wish.
Correct, and thanks a lot! I gotta take it out one of these days haha
Very helpful and educating .... Now i can check wife's car that is starting intermittently. Starts fine and sounds like will stall and all of a sudden it runs. I am suspecting fuel delivery issues. When gas pedal pressed it starts right away. Will start with checking basic stuff. Thank You
Well done, Chris. I saw other cars going up to 50~55 psi instead of 45~50 lol
B2Taste It depends on the car. Some injectors are built to work at 55psi, others are built to work at 35psi
Whom it may concern I had a Chevy truck I was working on for my neabour 1998 it had 58 psi.when you crank it no start it would hire when you turned the key back it hit and the fuel presser would jump to 63 ..I thought I was going to have to junk it you would of thought it would have ran but No ..Well I put a new pump in from G.M. and fixed it how about that guys..Let me know if you read this this kind of jobs will make a mechanic go to Wallmart..
Thank you. My 93 corvette will be needing a new fuel
Pump.
you are the man!! you are doing a great job.. thank you for being such a great teacher... keep on doing a great job!!!! Happy Holidays.... A holler from Russia :P
Thanks a lot! Happy holidays to you as well! Glad you are enjoying the videos and it is even cooler that people from Russia are watching!!!! Cheers!
jesus this helped me out a ton, thanks chris
Your tutorials are extremely concise, to the point, and very helpful with no wasting time or bs. Great filming of your work as you do it as well. I will continue to watch your vids and recommend you to friends. Thanks ChrisFix
What a nice, humble person. Stay blessed Chris
Great vid and tutorial 👍
Thank you dear Chris, quite useful and encouraging to probe my car's issues with fuel and stalling
nicely done
This is one the cleanest, easy to understand DIY vid ive ever watched. Def thumbs up
4:40
I think you made a mistake.
At idle, vacuum is highest. When accelerating, vacuum is less.
That's why when you disconnect the vacuum line, it simulates high throttle.
Yes
I also have dyslexia and I'll say the opposite of what I mean.
There are 2 types of dyslexia I believe, one is for incoming information like seeing letters backwards when reading.
The other type is out going information like giving directions, explaining something, or writing letters backwards.
It's frustrating because you know what you mean to say but it literally comes out the opposite.
@John Smith giving directions is always fun. It's weird because i dont try to go the wrong way if I'm driving.
I guess it has a disconnect and only effect speech.
Shit is weird, it was alot worse when I was younger.
I knew Chris made a mistake when vacuum is low or high.
These videos are in a different league from anything else on RUclips. You just cannot beat a ChrisFix video.
Criss fix your video are cool!!
Thankssssss
How are you going to dislike this video? Good info!
toneillish Thanks man!
Answered a lot of questions for a dude who’s not a mechanic, great video man !!
thanks Chris!!! thumbs up!
Thanks and no prob!
I’m in college and I learn more from your videos Chris. Thanks much man👍🏿
the needle shouldn't move that much on a snap way to much I would throw your low amp clamp on the fuel pump circuit and count your humps I bet it around only 3000 rpm I bet there is a miss on hard acc
This man is awesome I have a 94 Corvette with a fuel problem these guys response to all my questions that I have love the video
Bullshit, he has NEVER replied to my questions ....
Dude you are a genius & a champ.
Thank you very much. Your video helped us determine our problem. It was the fuel injectors on a 2006 Ford 4.0L engine.
Why can't you be my neighbor
He might be? we've never seen his face!
@@hcashmore11 there's a bunch of vids with his face in it
If you're in New Jersey, you can be close to him.
Thanks Chris. You are a natural teacher.
+fireblade211 thanks
theres more vacuum at idle
true
No shit. Just sayin
Probably the most informative how to video I've ever watched. Thanks
Thomas Nelson Thanks a lot Thomas. Glad the video was helpful! I try to make all of my videos informative and easy to understand!
Dude ur vids are really helpful man keep up the good work
Chris ur videos r great ive used ur
videos so many times I used this video too see if my fuel pump was bad thanks for the great video u have the best channel on utube for fixing cars
Hi Chris: I'm confused, I've watched a dozen videos on this subject and just when I thought I understood how it works...you tell me that it's to the opposite of what I understood....I thought that in an idle situation vacuum in an engine is at it's highest level..(throttle plate closed) and this high vacuum opens the fuel regulator to the max because very little fuel is needed so what is not used is returned to the tank. When the engine is accelerated (throttle plate open) vacuum falls off and fuel consumption increases and to maintain the pressure the lower vacuum lets the fuel regulator close to maintain the pressure in the fuel rail. I have a problem with a 2001 Santa Fe 2.7 GLS and I'm far away from scanners and vacuum pumps. That's the reason I'm watching so many videos....I'm not saying that you are wrong or not try to be smart...I just need to know.
He does have it backwards, when the throttle is closed is when you get the highest vacuum. I'm old enough to remember vacuum operated windshield wipers that would quit when giving the engine more gas plus he showed high vacuum when he unplugged the fuel rail regulator at idle.
Did you ever find the fix to your problem? I also have a 2001 Santa Fe GLS 2.7 and it has a very hard time starting, always. When it does start it runs perfect though.
Thanks for this, I always choose your videos over others because I like the way you explain things.
Vacuum is highest at idle and lowest at WOT.
Yea, I misspoke unfortunately. You throw a camera in the equation and you would be surprised how hard it is to get a good sentence lol.
Fantastic videos and diagnostics, but vacuum drops when the throttle is open. Just a lil fyi. Easy peasy. Thanks for the videos. Me and my roomie are watching your videos just to gain some knowledge
if it has a schrader valve, uncommon nowadays tho...
Wym most cars still do
Thankyou for all the videos you make man i greatly appreciate it! Your videos are the best quality and you make complex systems easy to understand which is a hard thing to do.
For some reason, ChrisFix doesn't sound right, he sounds sickish
That’s just the way he talked then vs now. In every older video he sounds gloomy. He sounds more hype in newer videos
The video is fantastic! I think you misspoke at one spot though, Chris. You said that engine creates more vacuum at higher rpm and it lowers at low rpm. It is right the opposite and thats why the pressure regulator works the other way around you explained.
Thanks and yea I flipped it around.
My LT1 Trans Am started running like absolute crap. Connected a gauge, when I prime the fuel pump, the gauge shows 10psi or less
Wow, you know what that means: ruclips.net/video/mDIlwbx0B-s/видео.html
Oh God please no! I already had this happen on my Camaro years ago. Removeing the pump on GMs F-body sucks. Funny because I watched that video after you uploaded it. Thanks for the reply!
yeah.. I have a minivan here with a similar problem and the sender stopped working properly miles back... time for a whole pump assembly
and man! they aren't cheap
Glycerin
It was the fuel pump. Car runs great now
Very informative and helpful. What to look for and why along with giving examples of what the problem may be. Kudos, you did an amazing job.
Saw ur face ☺☺☺👆
Great video bud I learned alot. I love you you get right to it, there's no 2 minute preamble about stuff no one cares about
Thank you for sharing your knowledge 🙏
Thank you very much for this video. I am having issues with my 2001 Monte Carlo. This is exactly what I needed to see.
Clear. Concise. I love it. Thanks Chris....... very helpful !