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Re: 2000 GMC W3500 w/ mechanical misfire
Posted to Technical Discussion Forum on 4/25/2014

Shannon,

I think if you add an EXHAUST or CRANKCASE waveform, you can nail it. As of now it appears to me that either the intake-valve isn't opening/leak-to-crankcase/ or leak to exhaust (past the rings or valves of the offending cylinder.

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