I put a head on my truck. I suspected a leaking injector the next day because every time I would start it after sitting a while the engine would knock and blow a huge plum of white smoke. Last night traveling about 70 mph the truck began to run very ruff so I babied it off the interstate. Smoking like a frieght train and running terrible. I through an OTC scanner on it and have a P0303 code and a dead #3 cylinder when I kill each injector. Here is my question....I capped off the #3 fuel rail to kill the fuel supply but the truck still blows clouds of white smoke. Why?

DCP

 

Could be another injector is gone also.

 

So is my money. At almost $400 a pop. a set of injectors are not in the budget.

 

You can send them in and have them remand for half the money. Only bad part is the turn around time.