Well boy's im in need of some help again.My truck has been (running off) kinda stumbling when i am driving. Got a buzz test done and good news is all past the test. Did the cylinder contribution test and not good news. Cyliners 3,4,and 7 are not helping the motor run (failed the test). The truck has 360,ooo mi on her but does not burn oil and does not smoke out tail pipe. Any help? I hope it is not rings,could the injectors be bad but pass the buzz test?
yes!!!! Sorry I should have updated this thread. Cleaning the fpr screen made NOTICEABLE difference in the starting, idling, reving, and driving characteristics of the truck. I think mileage went up a bit also.
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