03 cummins running rough.
 

Hi guys I have a problem with my 03 235 horse cummins. The truck is idling rough when you come to a stop after you drive it for while. The truck has a bullydog on it and it has the problem when the bullydog is on and not on. The truck idles normal in the morning and when I stop at work it starts to idle like it has a cam in the motor and shakes a little at the motor. It sounds like bloob bloob bloob bloob and after about 10 minutes the truck starts to run normal with a smooth idle. The only thing else I see different is my fuel mileage has fallen from 19-20 to 15-16 and dont have alot of power without the programmer on performance. Thank you for reading the thread. Any info on my problem would be thankful.:humm:

Time for new injectors I'm afraid.

X2. Though, if were me, I'd take the bully dog completely out. I started off with a Bully Power Pup and it made my truck do all kinds of weird stuff. Good luck.

thanks for the info on the injecters. I took the bully dog off the truck for about a month and it was still doing the samething. Thanks guys for the help.Would you guys have a good idea for injectors? Could you run bigger injectors and not change anything else? thanks:U:

I would be keeping a close watch on my oil level and quality until you get them replaced.

All of the vendors here can offer just about the same deal on new or reman injectors. If you want to go bigger, It would depend on the size purchased to determine if further upgrades are required. Gauges or a monitor would be required regardless

What did ya get figured out??

I found #1 #3 injectors were bad. Thanks all for the help and willingness to help me. Thanks again. :U:

Don't be modest, it's what were here for. Glad you got er figured out. :U: