Truck Specs: 2002 Dodge Ram 2500hd, Std Output 5 speed. Mods: BD-Diesel Flow-max Lift pump, BD-Diesel Exhaust Brake, AEM Brute Force HD air intake, Bully Dog Outlook with Performance Enhancement, Stock Straight Pipe. Recently my truck started intermittent miss at idle, and stumble during normal acceleration, under load / no load / from start.Truck has plenty of power, and good fuel mileage, Both conditions are random with no codes given, other than above exhibits no other issues.I've had issues with the bully dog outlook performance device in the past, causing stumble but goes away when I place it in stock mode. From what I've read on line in several places, it's been suggested that the computer on the vp44 might be starting to fail (ECM I think ?)Lift pump pressure is good. Any thoughts as to what might be going on (vp44,mpa, IAT)?Thanks in advance,Tony

What did you use to check for codes? I know you said your pressure is good but what are the numbers? Sometimes that info tells alot! Have you checked your fuel filter?

Codes and fuel pressure are a big help as stated. The vp has its own computer located on the top of the pump, the ecm is located on the block behind the fuel filter canster. the ecm can cost more than the vp.

Codes and fuel pressure is a good starting place to double check the fuel system condition. But as for the miss at idle seem like dirty injectors possibly. http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/25-fuel-system/62-injector-cleaning

Mine has an odd 'stumble' sometimes, at idle. Usually takes place right after I come to a stop at a light or such. It'll stumble just enough to feel it in the chassis. Usually takes place once the fuel level gets down close to 1/4 tank remaining.