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1988 Chevrolet S10 Blazer 4.3L Poor Idle Quality, Hesitation, MIL Lamp on
Posted to GM Driveability on 3/1/2000

Hello, this is a strange one. It came in with poor performance and stalling. KOEO with the scan tool connected, it would randomly pulse the injectors and display numerous DTC's. The ecm was replaced with no change. The prom was replaced, along with the mod...

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Message Closed w/FIX

car Vehicle Data

1988 Chevrolet S10 Blazer

VIN 1GCDT19Z7J
Engine4.3 L / 6 cyl
SymptomsPoor Idle Quality, Hesitation, MIL Lamp On
OccursAlways

Trouble Codes

42EST malfunction
Message Closed w/FIX

car Vehicle Data

1988 Chevrolet S10 Blazer

VIN 1GCDT19Z7J
Engine4.3 L / 6 cyl
SymptomsPoor Idle Quality, Hesitation, MIL Lamp On
OccursAlways

Trouble Codes

42EST malfunction