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Reply To: 2010 GMC AFM lifter failelure. Replaced, still misfiring.

Home Forums Stay Dirty Lounge Service and Repair Questions Answered Here 2010 GMC AFM lifter failelure. Replaced, still misfiring. Reply To: 2010 GMC AFM lifter failelure. Replaced, still misfiring.

#954384
Nightflyr *
Richard Kirshy
Participant

Suggest doing a leak down test on all cylinders and pinpoint exactly where the pressure is going if it is dumping into the crank case then your looking at worn rings, if you hear it coming from the intake or exhaust then your looking at a valve or valve seat issue.

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