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2008 Pontiac Grand Prix 3.8L Misfire
Posted to GM Driveability on 4/21/2015 44 Replies

I have a misfire on cylinder #6 at idle, goes away with RPM increase. Have tried new fuel injector, car has new plugs and wires on it and have swapped #6 with a different cylinder and no change. Replace lower intake gaskets, checked for vacuum leaks, none foun...

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  Related Documents & Media  2008 Pontiac Grand Prix

 
Message Closed w/Summary

car Vehicle Data

2008 Pontiac Grand Prix

VIN 2G2WP55288
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
OccursIdle

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/Summary

car Vehicle Data

2008 Pontiac Grand Prix

VIN 2G2WP55288
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
OccursIdle

Trouble Codes

P0300Multiple Misfire Detected