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Originally Posted by GMMerlin
I would first do an injector balance test..these injectors don't take much to plug.
Most of the injector problems I have seen have been caused by contaminated gas. It doesn't take much to plug the screens on top of these injectors.
if I do find one that has a plugged screen I recommend first replacing the filter and flushing the fuel rail.....if it is bad enough, I have gone as far as dropping the tank and flushing it out, flushing the lines and replacing the pump.
There are some other things that can cause your concern like a vacum leak, wiring issue or sensor problem, but most of the time on these vehicles I look at the fuel system first...all based on experiance
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I heard the balance test isn't always conclusive on locating a bad poppet. I stress the words "I Heard". I hear alot of things that are bull sh%#.