I've got a 92 w250, just installed ddp 75-100hp injectors. The idle now is rough almost to the point where it wants to die. Drives just fine tons of power but at lights the idle gets real low and rough. injectors are tightened all the way no leaks that I can see, possibly the injector pump going out? if so suggestions on a replacement.

 

did you bleed the injectors right? try re-bleeding them, check for any fuel leaks, how many estimated miles on the Pump?

 

Injector pump has roughly 235xxx on it, does have the 3200 governor spring. The injectors were bled right, Im thinking of taking them off and reinstalling them and see if that does the trick. Possibly do a fuel pin? I do have a white haze now as well, didnt have it before.

 

What is your idle rpm? It may need to be adjusted after injectors are changed.

 

White haze and rough idle says a dud injector to me. I would talk to who ever you purchased the injectors from and see what they have to say.

 

Well I called ddp and they said my low idle is to low this the white haze (nothing crazy) and rough idle. Problem now is that when I get the idle correct in drive and reverse the idle is way to high in park and neutral to the point where it goes into runaway, I can't fix one problem without creating the other

 

the idle needs to be 750-800 in neutral or in park, i know when i maxed my pump i had to back out the idle screw almost all the way out before i could even get it below 900

 

I've run into new DDPs with lazy springs before....

Having said that, they punch a bit above their weight class.

Spending $ to POP new injectors is your call.