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1997 Chevrolet Blazer 4.3L Misfire, spark knock
Posted to GM Driveability on 10/26/2009 28 Replies

The customer complaint is the check engine light flashing over 50 mph. Using a Tech2 the misfire graph is showing a slight misfire on all cylinders at all times while driving, over 50 mph #2 cylinder goes off the screen. I pulled #2 plug to look at it and the ...

28 Replies Received (View Replies)

  Related Documents & Media  1997 Chevrolet Blazer

 
Message Closed w/FIX

car Vehicle Data

1997 Chevrolet Blazer

VIN 1GNDT13W4V
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire, Spark Knock
OccursUnder Load, on Accel

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

1997 Chevrolet Blazer

VIN 1GNDT13W4V
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire, Spark Knock
OccursUnder Load, on Accel

Trouble Codes

P0300Multiple Misfire Detected