3500 RAM 6.7 won’t start/run

[Morgan Liptak]

2015 3500 died on me while driving down the road twice. First time we fixed the TIPM and thought it was running fine. Did it again and has been at the shop since. We have tried the PCM, all fuses, wiring, fuel pump, fuel injectors, injector pump, lift pump, everything down the entire fuel rail. It is not getting fuel pressure. Our mechanic and several others around can not figure out what it is. Any help?

 

[Wiredawg]

Are there any codes set? Is it at a dealer or local shop?

 

[Morgan Liptak]

No codes! It’s at a local shop. A friend of mine was a diesel mechanic for dodge but went to work local. He has it.

 

[Morgan Liptak]

It won’t start once it dies. We have had to tow it twice

 

[Wiredawg]

Gremlins can really be tough, so much electronics.

 

[BigPapa]

Where did your fuel filters come from?

Read this thread, he had a similar problem after a filter change.

https://www.turbodieselregister.com/threads/mopar-fuel-filter-defective-or-counterfeit.273571/

 

[Morgan Liptak]

Thank you! My mechanic said the fuel controlling state is on “stop”

 

[Morgan Liptak]

Where did your fuel filters come from?

Read this thread, he had a similar problem after a filter change.

https://www.turbodieselregister.com/threads/mopar-fuel-filter-defective-or-counterfeit.273571/

Thank you!!! My husband said fuel filters are on Amazon! So this could be it.

 

[sag2]

Sounds like you have thrown a lot of parts at it and are in the same place you started from. What diagnosis led you to replace all the parts? First thing I would do is give it a shot of starting fluid and find out if the engine is mechanically sound. It only has to fire for a second. Once you know the engine is sound you can start to diagnose. Lift pump volume? is there actually fuel in the tank, not water? Does it build rail pressure? If no rail pressure does it build rail pressure with the FCA disconnected? Is the little round red security light on the dash on?
You need to diagnose it logically and stop throwing parts at it.

 

[Morgan Liptak]

Turns out the pcm was bad but when we replaced and it didn’t work it was because the old pcm caused the TIPM to blow 2 fuses.

 

[sag2]

Your first post says they tried all fuses. Were they blown the first time and then they didn't check them again? Does not make sense.

 

[Morgan Liptak]

We replaced the tipm and the truck fired up and ran for about 3 days back in December. It shut down again. We didn’t think anything was wrong with the TIPM because it was brand new. That’s when they ran through everything and tried the pcm. Pcm was put in and I guess never checked the fuses on the tipm because it was brand new.

 

[Topzide]

The parts cannon can get you! Sometimes you need to step back and look at the whole picture. Step by step diagnosis will get you going in the right direction. Glad to hear that you got it figured out, Anything electrical can make you pull your hair out! Don't trust that it's good till you verify that it's good! Check and double check.

 

[sag2]

We replaced the tipm and the truck fired up and ran for about 3 days back in December. It shut down again. We didn’t think anything was wrong with the TIPM because it was brand new. That’s when they ran through everything and tried the pcm. Pcm was put in and I guess never checked the fuses on the tipm because it was brand new.

OK, that makes sense. Hopefully the ECM was really bad.