C 20 3/4 Ton Pickup 2WD V8-350 5.7L VIN L 4-bbl (1983)
Fuel Injector: Technical Service Bulletins
Fuel Injector - Electrical Damage Prevention
Number:
83-I-49
Section:
VIt
Date:
March, 1983
Subject:
FUEL INJECTOR, ELECTRICAL DAMAGE ALL 1982-83 MODELS WITH 2.5L (L4), 5.0L (V8), 5.7L (V8) WITH EFI
TO:
ALL CHEVROLET DEALERS
Analysis of returned fuel injector assemblies indicates a major portion have had internal electrical damage. Since the computer system
will not allow enough current to damage the coil, it must be assumed that they are subjected to abnormal current loads during diagnosis.
Service manual procedures state that all diagnostic testing of the injector be done using a test light. The test light serves as a "current
limiting" resistance which will protect the injector coil. If these procedures are not followed, the injector coil will be permenently
damaged.
Full battery voltage applied across the injector assembly will destroy the coil in less than a half a second.
