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

by in Placerville, CA on December 08, 2012
2 answers
ANSWER by on December 08, 2012
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?
ANSWER by on December 08, 2012
possible coil