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1989 Chevrolet G20 Beauville 5.7L Surge
Posted to GM Driveability on 11/4/2002 3 Replies

This old van is a friend's: not my usual cup of tea. The van detonates badly under any kind of load...surges some at low speeds. The code 42 seems to indicate that there is no spark advance occuring... symptoms corroborate this. Question is, where do I go from...

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  Related Documents & Media  1989 Chevrolet G20 Beauville

 
Message Closed w/Summary

car Vehicle Data

1989 Chevrolet G20 Beauville

VIN 1GNEG25K5K
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
SymptomsSurge
OccursUnder Load, on Accel

Trouble Codes

42spark control circuit
Message Closed w/Summary

car Vehicle Data

1989 Chevrolet G20 Beauville

VIN 1GNEG25K5K
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
SymptomsSurge
OccursUnder Load, on Accel

Trouble Codes

42spark control circuit