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1990 Chevrolet C1500 Cheyenne 5.7L Misfire
Posted to GM Driveability on 1/11/2007 36 Replies

This engine has a dead miss on #4 and #5 cylinders only at idle. Runs Great Going down the road and on acceleration. Feels just like a vacuum leak. We smoke tested and did not find an external vacuum leak. We also removed the EGR valve and checked (OK). We als...

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  Related Documents & Media  1990 Chevrolet C1500 Cheyenne

 
Message Closed w/Summary

car Vehicle Data

1990 Chevrolet C1500 Cheyenne

VIN 1GTEC25KSL
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsOBD1
SymptomsMisfire
OccursAlways
Message Closed w/Summary

car Vehicle Data

1990 Chevrolet C1500 Cheyenne

VIN 1GTEC25KSL
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsOBD1
SymptomsMisfire
OccursAlways