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1997 Chevrolet Blazer 4.3L Misfire, Spark knock
Posted to GM Driveability on 6/2/2009 24 Replies

We have this Blazer that is missing over 55 mph. The code is random misfire and #1 and 6 show a slight misfire but it is mostly #2. The car has new plug wires, #4 was bad. The vehicle pings nearly all the time under acceleration but only misses on the highway....

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  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, Cruise, Over 55 Mph

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, Cruise, Over 55 Mph

Trouble Codes

P0300Multiple Misfire Detected