I have an '03 Cummins 3500. I installed a Bully Dog Power Pup module three weeks ago. Last saturday I decided to wash my truck. After I was done I went to pull it out of the shop and it quit on me. It did this a few times, then straighted up. I thought it was a little water in the fuel or something. The next day it did the same thing. On Tuesday it did it again and then would not start at all. I know it isn't the filter and I think it is a pump but I'm not sure which one. All I know is no one around me knows anything about the '03's, I can't get a service manual, and i'm frustrated! Also when I turn the key on the fuel pump does not cycle.

PLEASE HELP!!!!!!!

Thanks

 

have you pulled the power pup off to see if it runs normaly without it?

I would suggest since you were washing your truck you got some water in a connection. check all the plugs.

 

Call Bully Dog, sometimes their chips aren't burned properly and issues arise. My tire installer had a Power Pup on his powerstroke and it had the same problem. They're pretty good with customer service, but you may have to stay on them via telephone (their email is useless).