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2004 GMC Envoy SLE 4.2L Powertrain
Posted to GM PowerTrain on 5/15/2013 12 Replies

swapped coils and spark plugs, spark plugs are ac-delco. no improvement misfire only at idle vehicle drive ok on freeway and city speeds. misfire is moderate.

12 Replies Received (View Replies)

  Related Documents & Media  2004 GMC Envoy SLE

 
Message Closed w/FIX

car Vehicle Data

2004 GMC Envoy SLE

VIN 1GKDT13S34
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedPowertrain
ConditionsMisfire on Idle
Message Closed w/FIX

car Vehicle Data

2004 GMC Envoy SLE

VIN 1GKDT13S34
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedPowertrain
ConditionsMisfire on Idle