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2000 Chevrolet Express 2500 4.3L Misfire, MIL Lamp on, only at idle to 1800
Posted to GM Driveability on 10/2/2008 4 Replies

compression 140 psi on cyl #4 injector balance test equal on all cyls. starts at 68 psi drops to 45 psi missing at idle upto 1800 rpms then stops on misfire counter vacuum gauge at idle is 18 ins. and not bouncing.

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Message Closed w/Summary

car Vehicle Data

2000 Chevrolet Express 2500

VIN 1GCFG25W8Y
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / sefi
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp on, Only at Idle to 1800
OccursIdle
Misc.Van

Trouble Codes

P0304Cylinder 4 Misfire Detected
Message Closed w/Summary

car Vehicle Data

2000 Chevrolet Express 2500

VIN 1GCFG25W8Y
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / sefi
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp on, Only at Idle to 1800
OccursIdle
Misc.Van

Trouble Codes

P0304Cylinder 4 Misfire Detected