6.7 Cummings Truck dies after letting off accelerator

[Rustybigred]

After starting truck and letting off accelerator peddle on my 2007 6.7 cummmiings 3500 4x4 the motor will die. Can’t get the truck to stay running.

 

[4xdad]

Diesel air or fuel about the only things

 

[4xdad]

If you pull the air filter does it change fuel filter could be bad or bad fuel any codes

 

[Rustybigred]

Had truck at one mechanic shop for like 2 months and they decided that the injectors were bad. Bought brand new injectors from the Dealership and it ran for about 1 month and than started having problems with truck starting. So I took it to the dealership here in town they replaced the fuse box under the hood and also the instrument cluster in dash. But still had a problem in the mornings with truck not wanting to start. Now it will start if you spray a little starting fluid and than start it but let off of peddle and truck dies.

 

[Fuel35 67]

When was the last time fuel filter(s) were changed.

 

[4xdad]

Yeah sounds like fuel trouble to me

 

[06 Dodge]

After starting truck and letting off accelerator peddle on my 2007 6.7 cummmiings 3500 4x4 the motor will die. Can’t get the truck to stay running.

If your still having problems you can always check with the guys on Dodge Cummins Forum: https://www.cumminsforum.com/forums/

Good Luck

 

[4xdad]

Put a scanner on it first off older diesels where mechanical the new are computer controlled I don’t own a diesel but I run heavy equipment for a living pretty much the same technology def is a killer in the cold

 

[4xdad]

If you can keep it running by giving it fuel it is probably a fuel issue if it blows black too much fuel or not enough air

 

[4xdad]

But the best scanner you can afford it helps avoid guessing if a mechanic is telling you he thinks it’s injectors maybe it’s maybe nota scanner should tell you

 

[crash68]

Put a scanner on it first off older diesels where mechanical the new are computer controlled I don’t own a diesel but I run heavy equipment for a living pretty much the same technology def is a killer in the cold

If there is a problem with DEF in modern diesel engines, you'll get a service/no start notice if there is a problem, but it doesn't stop the engine from running. DEF doesn't go through the engine, it's injected downstream in the exhaust into the SCR.
Cummins didn't start using DEF in the Ram trucks until the 2013 model year.

 

[4xdad]

You are right def is not the issue the truck is not new enough but it’s apita I would scan it and change the filters

 

[4xdad]

So what news