I have a 96 Burb, stock with relocated PMD and Turbo Master. If this truck was a gas burner i would think it had a fould plug. Running at highway speed 60 -70 it will act like a missfire type of condition but not evertime i drive it . i have no current codes in computer.Will my lift pump act like this if it is going bad. This is my first diesel. Please Help.........

 

my dad's 95 6.5 does the same, and its a scary combination of things that were wrong with his that made it do that... including a broken radiator, blown head gasket and a cracked block just to name a few....

The first thing I would do is make sure that your injectors are clean, get some cleaner from your local NAPA or whatever and see if that helps out, if you notice its helping then its more than likely an injector issure...

after that, make sure that there isnt any water in the oil or visaversa

 

Well it is not a plug . where did you get the pmd if you got it from SS diesel supply you wasted your money . Lift pump maybe . Is the truck running hot or does the temp gauge rise up and down is it hard to start

 

No temp related issues and i have a used pmd but i am running on the oe injectors at 151,000. Well overdue i know. could be prob? Which injecters would you recamend?