DODGE RAM 1500 CRANKS BUT WON'T START DIAGNOSIS & FIX
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- Опубликовано: 8 фев 2025
- In today's video we take a look at a 2012 Dodge Ram 1500 with a V6 3.7l engine. The owners complaint is that the truck cranks but the engine does not start. Customer states that she had to slam on the brakes abruptly after another driver on the road cut her off. After that the truck lost power, eventually died and would not restart. Follow along as I show you some of my different methods to diagnosing a faulty fuel pump.
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The owner recently told me that she drove over an embankment a couple of months ago. She said the truck had to be pulled out by a tow truck because the frame was sitting on the ground. I believe the gas tank may have taken a hit during that incident and that is what broke the fuel pump hanger. She must have been driving a couple of months with the fuel pump module just swashing around freely in the tank. I'm thinking that when she had to stop abruptly, the fuel in the tank swashed around hard enough that the fuel pump got disconnected.
Yo hermano just pack that old pump in the delphi box, it probably still works, throw it on Marketplace for 250 and rake in some extra plata. Saludos de Guatemala!
Hey Eric.I have one question for you. I don't know why you put your email on the website that if anybody have a question they can contact you. It look like you want to reply what favor you. Don't worry about it thank you for your time
You can use the power probe to load test a ground without using a test light… the instructions that come with the power probe tell you. So you touch the tip to ground, then you hit the power button. If there is a good ground, it trips the circuit breaker. It says that right in the instructions manual. Power goes out of power probe and if it finds good ground, trips that circuit breaker, boom, done
@@davidokpoti5686 You don't make any sense at all!
Who the hell are you to tell me that I don't make no sense.If you don't know what I'm talking about you need to shut the hell up.The person I send the message to why he haven't respond
Love the confident attitude when we all know this is not easy stuff.
Lmao! 10 min repair vid takes me 3 weeks.
Great diag process vs. buy expensive parts hoping for a fix. Those Delphi parts are top quality. Delphi makes GM oem parts and has for decades. No worries with the Delphi brand !
In this case, the entire fuel pump module makes sense but in many fuel pump jobs, I see mechanics opting to replace the entire module assy rather than just the fuel pump itself. I bring this up because the fuel pump itself, if it is offered separately as a replacement part, usually costs $40 or so vs. the $200 and up prices for complete modules. There's only a tad more labor involved to transfer the existing pump out and install the new one.
Keep your fuel line tool with your fuel pressure gauge at all times. Also, its a good idea to recharge battery jumpers each day as a routine to avoid a useless tool when needed.
Thanks for sharing your good skills.
good point- thats what i did
I wish I could like this video a million times! Thank you so much for taking the time to upload this content even when it’s a pain in the rear end, it’s all definitely worth it and we appreciate your service 👍🏻
Brilliant failure analysis, and I love your ground side load testing.
Thank you very much!
Hes a beast when it comes to this diag and vlog. My new favorite channell!
Actually lucky, my 2015 Ram fuel pump relay went out (super common issue) and the fix is usually to replace the TIPM. I built a relay bypass and saved a grip on the repair. Dodge does sell a bypass but it's still expensive but not anywhere near the $1000 new TIPM. Love your in depth video's THX
Very helpful and I hope I can get my truck running with this troubleshooting process. I wish you would have shown how you got the tank out with all the necessary disconnections. I guess you can't show everything all the time. Thanks for the information and time invested in making your videos. Great knowledge thank you!
welcome back. Missed these videos :)
Thanks for sticking around!
you simply are a BOSS at diagnosing. I challenge anyone to come up with a channel that does better diagnosing.
Yeah I'm with you he describes it well and is very clear
The fuel pump was just hanging by a " thread " and when she slammed on brakes the " wave " created by gas inside the gas rushing to one side of tank was enough to destroy it inside ... You are a master 👌👌
I don't even own a truck, but your videos are always very entertaining and your way of diagnosing problems are very interesting.
Thanks for explaining everything so clearly. You go step by step and explain each step. Thanks.
Great Video Eric! Man those vehicles are sooo clean in Texas! Up here in Michigan the rust makes working on the vehicles crazy hard . Working on them in the rust belt you can always plan on replacing more parts destroyed from rust!
Great Video Eric. At first thought I thought the problem lied in the TIPM relay. A common failure point. But I see that this truck had the Relay Bypass fix done. I think the Relay on the side of the fuse box is the new bypass fuel pump relay. Oh, and I would like to have seen if the old fuel pump motor was working. Maybe it was the connector that became unplugged. However the plastic on the module assembly was broken and even if the pump motor was working, maybe the module assembly was beyond repair.
Brilliant Eric. Love your way of putting across what you are doing at each step. You should be teaching students at college with your methods.
I want to thank you for taking the time to video and show me the tools you use and what to look for. My shop truck is a 2016 and has 38000 miles and when I was driving it started sputtering and then it died. Boss towed me back to shop and initial check I believe the pump is bad here. Great job explaining how you do this and keep up the good work.
These trucks are also known for having issues with the fuel pump relay that is built into the fuse box. Check to make sure you have power on the fuel pump fuse before condemning the pump. Thanks for watching!
@@ADVANCEDLEVELAUTO I will. and thanks again.
@@ADVANCEDLEVELAUTO I have a 2001 1500 4x4 cranks-but no start after she died on the highway under light load.. I heard too could be crankshaft pos sensor
Ideas? Great channel, btw.
I'm subscribed.
Advanced Level Auto.. Nicely done sir... I like how you explain things..
ERIC, YOU ARE #1 IN YOUR TECHNICAL APPROACH. PERFECT ON THE MONEY. THANKS
Awesome job, man. I Like how you went thru every process of diagnosing the entire problem and being able to even record the top of the fuel pump while it was still on the car. Awesome job, man... 👍👍
You are definitely a master mechanic.
Very good tutorial. Sorry to hear that the customer didn't mention of possible damage in the rear of the truck chassis. Great job. I'm a new sub. thanks.
Another great vid. So informative. You are a natural teacher. Don't be such a stranger. Missed your regular vids. Hope you and the fam are well. Keep em coming. 🤘
What type of diagnostics scanner do you use on the video
Thank you, this is one of the best RUclips how to videos I have seen. And I have seen many. Well done!!!
Fantastic video. I like your clear explanations. You said it at the beginning, getting down to the basics of spark and fuel. The supplies to any gasoline engine, even lawn mowers. In this case it was the fuel. Your tools are more sophisticated than the average guy, but we should still be able to follow your lead.
Glad you're back. Great video 👍👍
Thanks 👍
Great video. Also good tip. I almost got burned by few cars. Crank no start conditions are kinda tricky. I guess I’m still learning. Hooking up fuel gauge is a nightmare. I need better tools and also I’m deaf. I Can’t hear fuel prime or click. I can feel only vibration or using test light. Hearing compression sound wise is very challenging 😭. I used scope for extra help. I still check basic.. Spark, fuel, injector pluses ,air ,and timing/compression.Test not guess.
the way you say it. Better than my teacher. That's talent. Like all your vids!
Great hands on tutorial which made it look easy. I have had to drop two p/u truck gas tanks solo, in my driveway to replace the fuel pumps and each time I swore never again. Nice job.👍
i cut an access hole- makes it a whole lot easier
@@ufartface What kind of blade and tool did you use to cut through the truck bed?
I have also seen someone unbolt and raise the truck bed.
Wish you was my next door neighbor
A good mechanic is hard to find these days you knowledge of electrical systems and how to test them is amazing. .
What kind if training do you have to be so good at what you do
Most satisfying mechanic video
Been waiting for one of your videos…thanks!!
Sorry it's been a while. Thanks for your patience!
@@ADVANCEDLEVELAUTO We understand...lot's of work involved. With that being said, Keep them coming. :)))
Eric thanks for sharing the video. All of your videos are through and informative. You always do an excellent job of showing the system on the wiring schematic and then you show us and explain your testing procedures. Thanks buddy stay safe and well Artie 👍
Thanks for always watching!
Great video and great diagnostic skills. I never would have known you can do the fuse jumper to check for current. Thanks for the video! You have a new subscriber.
Re: Cost of fuel pump...
Within the last couple of years, I replaced the fuel pump in my Chevy Cavalier before a long 4,000 mile cross country trip. The vehicle had around 120k miles and I didn't feel like getting taken on the road for a grand on a job I could do myself at home.
But, a check of part suppliers showed the pump is only sold as a whole-fuel-assembly part (pump, sending unit, installation cage, etc.). At a pricey $400 for an OEM ACDelco unit, I passed. After some research on-line, I found an eBay vendor selling just the physical OEM pump for those willing to take the time to rebuild the sending unit -- at a cost of $40. Let me tell you, those sending units take patience and a delicate hand to disassemble.
But, the effort was worth it! The new fuel pump allowed the car to bang out the long distance trip without any hiccups.
So, the moral of the story? If you're a DIY'er, look at eBay for vendors supplying work-arounds to expensive full-assemblies.
good going- mine was $11 lifetime warranty and free shipping of course an access hole makes the job easier
I would say that when the driver hit the brakes, the fuel sloshed forward and broke the pump.
Excellent diagnostic Eric, you covered all possible failure points.
Very nice fault finding Eric... WELL DONE!!! 10/10
A mechanic is like a Doctor
Keep asking questions and taking notes tell you figure it out
Respect to you Eric for doing it on the ground without a lift and by the way, the undercarriage of that truck is clean lol! Also when you tried starting the truck for the first time, it seemed like the temp was already warm! What a teaser lol great job men!
Easy to follow through whole video good work 👏
my 2010 has a schraeder valve on the right fuel rail for checking fuel pressure.
Having the same issue what tools do you need for the fuel rail
@@stevenbrian3001 a fuel pressure gage kit.
Love those case studys, thank you.
Despite what some say here, you performed a VERY GOOD diagnostic test!
Im not a mechanic but i love watching your video..keep uploading bro
Thanks for the info and explanation on thinking what to do next. it shows your reliable experience and thinking process coming up with solutions. and I like how you show results and not boring us with how you took it apart and put it back together, just the facts that matter. Keep them videos coming so we can get it done right! Great job!!!
Great video. Detailed and to the point.
You're such a brilliant guy and your explanation point was very informative. Bravo!!!
Been awhile glad to see you back bro!!
Nice diagnosis and thanks for the link to the Lisle tool.
So, I have had this truck for 16yrs. It is a 2007 Dodge Ram 1500 4.7 liter flex fuel 2WD. It has literally been the best vehicle that I have ever owned, and I would really like to keep her for a couple more years, and then give it to my nephew. Anyways, a couple of weeks ago the RPMs started running pretty high, when I start it up in the morning. Also, I noticed when I come to a complete stop that it feels like the transmission stutters. That said, I drove her pretty hard this past weekend and then ran her through the car wash. So when I was drying her off, I've always been able to take the key out of the ignition and it stays running, but when I go to drive it again, I put it back in, before I take off. So this time when I started driving about 3/4 of the way home it started to really have a tough time shifting out of second gear. I got her home and parked and that's when I noticed that the key was not in the ignition, so I put it back in and shut her down. When I tried starting her in the morning it wouldn't start, all it does is constantly turn over. Funny thing about this is, I got it towed to my mechanic and he was able to get it started by spraying some starting fluid in the throttle body and it started right up and I was able to drive it home. It didn't run great but it ran surprisingly good, but as soon as you turn it off, it won't start again unless I spray the starting fluid in the throttle body again. I know this was long winded, but does anyone have an experience with this problem, or have any idea what this problem could be caused by? The mechanic has a feeling that the TICM has a short and probably needs to be replaced. What say you guys?
Thank you because I love the way you explain detail by detail step by step
It's always good to know this things when you are dealing with an unknown problem.
Step by step it will lead you to it. Zas zas zas
Excellent,,,,,she must have bounced the hell out of that pump,,,,Great Video,,,
👍👍 from Ohio 🍻🍻
Great video as always! I was nervous about you sticking your phone in the gas tank though, because of possible ignition of the fumes.
*👍👍👍👍👍 Very Detailed, Entertained, Educated, Smart And Clear! Thanks Man! The Best And Spectacular Mechanic!*
Thank you very helpful
Great diag and repair!
It's also possible a previous backyard mechanic was lazy and only dropped the tank far enough to squeeze in that first fuel pump, installing it in a compromised condition. That's the most likely explanation for the missing plastic and the rods falling apart that makes sense to me. Great video, like your fuse buddy, gettn one. :) Also, great job lettn us know you pulled the fuse before load testing the ground, I was wondering.
nice smooth diag. ...... with the exception of that damned back probing ......LOL!!!! You ever notice the old we get the worse it is to get our old man behinds down there!!!!! Great video brother!!!!
You are a great instructor your tone your delivery. Plus your passion for solutions thru process. So what's your names where is your location? Do you have other media sites? Im proud of your professionalism.✈️
Always a great video brother! Keep em comin!!!
Yep that relay is built into the mother board and one great way to check it is to check the fuel pump fuse when the pump is actuated bu the scan tool… and finally check at the connectors at the actual fuel pump I don’t a few of these dodge trucks super easy…. I verify ignition with some starting fluid
Always very informative about the diagnosis. Good content my friend
it was a great and informative video thanks for your comprehensive explanation❤️❤️❤️
My wife's car was rear-ended once with minor damage. The body work was completed and we drove it for years after that. Well the fuel pump quit on me one day and I changed it myself. When changing it I noticed that there were anti-slosh baffles inside the tank that were shattered and laying in pieces inside the tank.....I assume from the impact years earlier. The factory must have put anti-slosh baffles for a reason but it didn't seem to affect the smooth running of that car anyway. And we lived on a VERY steep hill.
Great video. But the bypass relays with the switches Don't come in the $275. Listle kit. It is a Separate kit ,like you showed in your video . The Mac tools kit is $175. Otherwise good info 👌
Wow I learned so much watching your channels I wonder if I can do this stuff on my own because I'm so weak in doing wiring on a car. You are so funny every video I've seen your jump boxes are never charged or dead. Lol.
Always look forward to your videos
What I hate about auto mechanic is trying to get to the connector or bolt. How the heck did you back probed that connector?
That was some very good, knowledgeable work. And explained well. Nice job.
You are very detailed in your explanations of why and how you test components. Thank you, for someone learning it helps to understand why you are doing something, and gives a more complete picture. You should teach a classroom.
I just realized he said I don't think the fuel pump is coming on to me 😂🤣🤣😂
good video this was excelent diagnistic
Welcome back.Hope all is well!
Great video, I love the you explained and in detail, great job, love it
Awesome information 👍. Always good watching your Videos
Excellent diagnosis!
Content was so detailed and helpful. Thank you brother! Hopefully I can figure my problem out. God bless you, keep up the great work!🙌🏼💯😎
Very thorough video I appreciate your professionalism but for us guys without $$$ scanners etc. we have to do things old school. I watched the entire video and was impressed! Going back to electronic ignition and 4 barrel carb lol 🤣
That's why it's important to tell the full story
Could have saved a lot of time giving you that story up front! Just WOW!
Love you so much. So much i have learnt through your videos. Thanks and be blessed.
Love watching all your videos. You should do more video with Oz!
Thanks Eric. This is superb diag.
Welcome back where have you been lost its been a while
I am so glad I found your page! I have been having some problems on a 2010 ram 1500 with a 4.7L that I'm working on. I have 2 codes p0688 and p0562. The fuel pump is good. But the truck just cranks and won't start. I'm thinking the computer isn't sending signals to send spark and fuel. What do you think??
Great Video, better than in class instruction!
It happened when she had the hard brake incident. The fuel pushes so hard on the pump that it brakes it. Ive seen it before on wreck accidents. The pump hangs on the wires only then when the wires brake then it wont start.
Excellent video explanation, AWESOME blessings.
Great video, very informative. Subscribed.
Excellent video Bro..
Man I was wanting you to try to run that pump you pulled out after you found that plug had come off.
I thought about it, but I didn't get around to it. Filming while dropping a gas tank solo in a parking lot is not easy. Thanks for watching!
Could the emergency shut off on fuel pump be partially tripped
Awesome work man. I would love to have someone as good as you check my truck I have a fake fuse in my truck that’s the only thing keeping it on. If I try to use a new or original relay it will not turn on
I seen some Chevy that hitting bottom of tank will start fuel pump running if defective
Also ground at rear of vehicle can be broken or torn off by the curb or tee post
Had it happen running over very heavy brush/ small trees
I just spayed stater fluid into the intake and the truck started. Diagnosed it myself as fuel pump, without all the other stuff. Confirmed by repair shop.
If you had a bad power or ground wire to the pump your start fluid test would still start motor.... Now you replaced the fuel pump and would be in the same boat if no start lol 😂 part replacer . You just got lucky
Did you try to reconnect the old flue pump internal connector and hook it up to power i.e. 12volts and ground to see if the pump was now operating? If it did that could have fixed it with no parts required.
Awesome job, everyone already said what I would have. Keep it up.
This is a ton of good info, but may have been overkill unless it was done just for video purposes.
1) tap on the fuel tank while cranking the engine. If it starts, almost certainly the fuel pump.
2) if that doesnt work - spray a squirt of carb cleaner or starting fluid in the air intake. If it starts & stops - its a fuel issue. If it doesnt start, probably a spark issue.
Great explanation.
Excellent diagnosis! Thanks
great video and diagnosis , nice one man