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1996 help with loss of power

6372 Views 36 Replies 7 Participants Last post by  BigFuel
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?

Thank you
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All on the same side and next to each other huh? Check the pigtail going to the that side of the head looking for damage/melting.
No, they're not. 4 is on the other side. They're all three on separate UVCHs.
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