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1997 Chevrolet Blazer 4.3L Hesitation, Misfire, MIL Lamp on
Posted to GM Driveability on 9/24/2009 17 Replies

One yr later here it sits with the same p0300 and its misfiring on cyl #3 & #4. #4 is the worst with a count of over 1700. #3 is around 350 and all others are at 0. ive watched the o2 sensors. post cat sensor indicates bad cat. Checked for back pressure no mor...

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car Vehicle Data

1997 Chevrolet Blazer

VIN 1GNCS13W1V
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / CSFI
EmissionsOBD-II Compliant
SymptomsHesitation, Misfire, MIL Lamp On
OccursUnder Load
Misc.Current ECM Cal

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0300Multiple Misfire Detected
Message Closed

car Vehicle Data

1997 Chevrolet Blazer

VIN 1GNCS13W1V
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / CSFI
EmissionsOBD-II Compliant
SymptomsHesitation, Misfire, MIL Lamp On
OccursUnder Load
Misc.Current ECM Cal

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0300Multiple Misfire Detected