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

this model has throttle body
and distributor

high missfire when accelerating

Asked by for the 1997 GMC Yukon
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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possible coil