Caprice Wagon V8-350 5.7L (1994)
Ignition Rotor: Customer Interest
Engine - Miss/Poor Driveability
File In Section: 6E Engine Fuel & Emission
Bulletin No.: 87-65-27
Date: December, 1998
Subject:
Engine Miss/Poor Driveability Symptoms
(Install Opti-Spark (ABITS) Distributor Assembly Service Kit)
Models:
1994-96 Buick Roadmaster
1994-96 Cadillac Fleetwood
1992-96 Chevrolet Corvette
1993-97 Chevrolet Camaro
1994-96 Chevrolet Caprice
1993-97 Pontiac Firebird/Trans Am
with 4.3L or 5.7L Engine (VINs W, P, 5 - RPOs L99, LT1, LT4)
Condition
Some vehicles with the above engines and equipped with the Opti-Spark (ABITS) ignition system may exhibit an engine miss and/or poor driveability
symptoms.
Cause
The (ABITS) cap and rotor may exhibit carbon tracking, cracking, or water intrusion which can cause an engine miss and/or poor driveability symptoms.
Correction
Perform strategy-based diagnosis. If it is determined that the ABITS cap and/or rotor is the source of the concern, then a service kit may be now
implemented instead of a complete ABITS assembly.
Parts Information
There are two (2) variations of Opti-Spark Distributors. It will be mandatory to identify which type is to be serviced for proper parts procurement.
