J.DAVY

Is there any tell tale signs?Would running A pyro at each port show anything?Would there be sudden drop in rail pressure?

doorguy

I have been told I have a leaking injector(s). My truck has excess black smoke under load and exceleration. They dertermined it from the scan tool by the engine load pertcentage being low. Does not make sense to me but two different techs said the same thing. I did a thread on my problem and someone said they can do a cylinder contribution test( they kill one injector at a time and the other ones make up the difference, something like that can't remember forsure. He said if they do not know about the test that "star on line" could tell them. My dealer said they could not do it, I got mad and walked out. I am going to bite the bullit and get them changed at a private shop. I have no warrenty(miled out). I you have warrenty let the dealer do it. I would think I you have a sticky injector you might have excess smoke, miss, hard starting. Do you use a fuel additive?

J.DAVY

I do use a additive.I have missed a couple of tanks but been pretty steady.I had 2 bad injectors, they replaced them, then my truck passed one test but failed the cylinder efficency test,I will know more on monday.

PourinDiesel

JDavy,
What exactly led you to believe you had 2 injectors going or bad?

J.DAVY

I had a little bit of power loss and alot of bottom end smoke.The dealers scan tool showed that it had 2 bad injectors,the dealer said it would creep up in rpm past the set point indicating a bad injector.It also had a slight miss on topend.