I have a question for all you 24 valve lovers, and I need some help badly. I have a 2001 dodge cummins 2500 with about 117,000 miles with an auto tranny. In the last month I have been experiencing a rough idle(700 in drive, in park fluctuates between 700-750 sometimes very fast creating a lope in the exhaust kinda noise) the last couple weeks upon start up, I get a little white smoke until the engine warms up after 10-15 mind otherwise no white smoke, and if there is any after it's black, and to top it off I am now beginning to average 12mpg all round. It's horrible. Trucks starts up first time every time, doesn't "appear" to be losing any power either. It has a stock tranny, fuel lift pump and vp44 also. Scanned for codes also not a single code. I will with in the next week be putting in new rv275 injectors and an upgraded fuel lift pump. Will this solve my problem?? Can we cancel out my vp44 to being a problem��? Any help would be greatly appreciated, thanks guys

 

Where is the fuel pressure at?

 

I haven't checked my pressure because I don't have a gauge. It's going to be going into a shop in about a week or so. Original injectors, vp44, and factory fuel lift pump though. Any feedback would be greatly appreciated

 

13 year old, 117,000 mile lift pump is where I'd start pointing. Once you can verify fuel pressure at idle, cruising, and at wide open throttle (WOT) you can determine the lift pumps status.

 

Okay thank you, I will give that a whirl and get back to you guys. I gotta wait tell the 27th to get the truck into the shop cause its backed up. Hopefully it's just the lp