I'd check your fuel pressure from the lift pump. With the 02 the failure of the lift pump can kill the injector pump, which will lead to a hefty repair bill. The white smoke could be a faulty injector. I'd take it to a reputable diesel shop/dealer and get it checked out. The couple of hundred $$ it cost's you may save you a couple thousand $$ in repairs if you keep driving it the way it is.

How long has it been since you changed the fuel filter?
Just a thought.

Randy

 

ive never changed the fuel filter ive put 20000 miles on it

 

now would be a good time, I changed mine every time I changed the oil filter, especially if you have ever ran bio diesel.

 

yep you got dead pedal syndrome...your lift pump took a ******* on you and is killing your injection pump...very very common on 98.5-02 cummins with the vp44...its almost a must to have a fuel pressure gauge on these trucks...changing your fuel filter might help but most likely the damage is done...