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1997 GMC Yukon Question: throwing code p0306? new wires plugs rotor cap o2sensors and mass airflow sensor

 

Question

yukon7, 5.7L V8, Placerville, CA, December 08, 2012, 18:00
 Rookie

this model has throttle body
and distributor

high missfire when accelerating

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  • Answer #1

    December 08, 2012, 19:34
     Master

    What did the plug cyl. #6 look like when you took it out ? was it oil fouled? was it indicating a 'lean' misfire? Compression & valves/rockers good? Vacuum leak from intake?

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  • Answer #2

    December 08, 2012, 22:06
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     Master

    possible coil

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