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2002 GMC Envoy SLE 4.2L Misfire
Posted to GM Driveability on 1/23/2013 10 Replies

Car came in for check engine light on and runs a little rough at idle. Put scan tool on and found p0303, pulled coil off checked plug swap plug and coil with different cylinder. No change. Still missing on cyl 3. Did compression test had 150 psi, cylinder leak...

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  Related Documents & Media  2002 GMC Envoy SLE

 
Message Closed w/Summary

car Vehicle Data

2002 GMC Envoy SLE

VIN 1GKDT13S52
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / EFI
EmissionsOBD-II Compliant
SymptomsMisfire
OccursIdle

Trouble Codes

P0303Cylinder 3 Misfire Detected
Message Closed w/Summary

car Vehicle Data

2002 GMC Envoy SLE

VIN 1GKDT13S52
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / EFI
EmissionsOBD-II Compliant
SymptomsMisfire
OccursIdle

Trouble Codes

P0303Cylinder 3 Misfire Detected