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1999 Chevrolet Blazer 4.3L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 7/23/2016 22 Replies

Cylinder number 4 misfire only at idle. Performed cylinder leakdown and found exhaust valve not seating. Removed both rocker arms and cylinder seals with no leakage. Cylinder is at TDC, swapped rocker arm, pushrod, and lifter from other cylinder and same resul...

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  Related Documents & Media  1999 Chevrolet Blazer

 
Message Closed w/FIX

car Vehicle Data

1999 Chevrolet Blazer

VIN 1GNDT13W8X
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursIdle

Trouble Codes

P0304Cylinder 4 Misfire Detected
Message Closed w/FIX

car Vehicle Data

1999 Chevrolet Blazer

VIN 1GNDT13W8X
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursIdle

Trouble Codes

P0304Cylinder 4 Misfire Detected