My 5.90 Cummins 2003 Dodge Turbo Diesel is surging and I have not been able to fix the problem. After it surges, it dies, in the middle of the road. It happens in warm and cold whether, on short trips and long trips, different climates and states. I have put additives (Power Service) in it and it helps for awhile, but then the problem returns. Also, changed the primary fuel filter and drained out the water collector. No one seems to know what is wrong, or where to start to fix it. Any suggestions?
Thanks

 

Fill in your signature with truck specifics and any code coming from the computer.

 

It is a 2003 quadcab, turbo cummins diesel, 4x4, 2500. There are no error messages from the computer. It was tested. If I appear naive, it is because I'm doing this for my husband who is working!
Thanks

 

It sounds like your lift pump is about to die. Thats the little pump that transfers the fuel from the tank to the injector pump. How many mile on the truck? If under 100k it is under warranty. usually wont throw a code but somtimes will. If you turn your key on - off three time then leave it the on after the third time it will show a code if one was set in the odometer. If none were set it will just say done.

 

Might be some air getting in also didn't you say changed the filter?
give that a check for any leaks, but just might be that pump need fp gauge to know for shure.

 

Mine did the same thing a while back and i had it checked by everybody, the last person i went to he suggested testing the apps, and it was it, replaced it runs good now.
Hope that helps

 

Thanks so much. We'll give these a try. I'll let you know what we find out.

E.

 

We did the test with the 3 key turn on/off. Here is the code P-0628.

Anyone know what is means?

Thanks

 

Here's the code's.

https://www.dieseltruckresource.com/...n&onlynewfaq=1

 

THANK YOU! I think we are narrowing it down. You guys are great!!!!!!
Have a great day!
e.