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1988 Chevrolet C1500 Cheyenne 4.3L Poor Idle Quality, MIL Lamp on, BACK FIRE
Posted to GM Driveability on 3/18/2003 22 Replies

Hello

Customer brought truck in with a backfire problem under load. I took the truck for a test drive. It would backfire undere load. Hooked it to the scope noticed a high idle but plugs, wires and cap all looked good. Did a power ballance test checked good a...

22 Replies Received (View Replies)

  Related Documents & Media  1988 Chevrolet C1500 Cheyenne

 
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car Vehicle Data

1988 Chevrolet C1500 Cheyenne

VIN 1GCDC14Z9J
Engine4.3 L / 6 cyl / GAS
Trans3-speed Automatic
DeliveryFI / TBI
SymptomsPoor Idle Quality, MIL Lamp on, Back Fire
OccursUnder Load, Idle

Trouble Codes

44lean exhaust
Message Closed

car Vehicle Data

1988 Chevrolet C1500 Cheyenne

VIN 1GCDC14Z9J
Engine4.3 L / 6 cyl / GAS
Trans3-speed Automatic
DeliveryFI / TBI
SymptomsPoor Idle Quality, MIL Lamp on, Back Fire
OccursUnder Load, Idle

Trouble Codes

44lean exhaust