Injector issues maybe?
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a buzz test is a test that you do with the engine off. it will put power to the injector which opens the cellinoid rapidly. it will uzz all 8 first, then each injector individually in numerical order. if a injector is bad it won't buzz and it will tell you which one. or is a injector is not that good, it will have a weak buzz. a CCT means cylinder contribution test. this will determine if there is a cylinder that isn't keeping up. when i run a CCT on mine, i get a #3& #8 balance fault. which is due to the CPS.
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#9
Hey guys so I put the scanner on my truck and I have no codes did a cct test and buzz test checked out good. Also I pulled the Hypermax and still does the same stuff. Trucks lopes real bad when you first start it. My IPR was at 11% and my ICP is 580psi. Do these numbers sound rite??? Im stumped with this thing I just put a new fuel/lift pump on it. Thanks for the help guys