Campaign - Engine Misfire, Hesitation, Sags, No Re-start: Overview
87chevy04Number: 85C22a
Section: 6D
Date: February, 1987
Subject: PRODUCT EMISSION CAMPAIGN 85C22a HIGH OUTPUT IGNITION COIL
Model and Year: 1984-1985 CHEVROLET CAMARO MODELS WITH 5.0L V8 (RPO L69/LB9),
1985 MONTE CARLO MODELS WITH 5.0L V8 (RPO L69) AND 1984-1985 CORVETTE MODELS WITH 5.7L V8 (RPO L83/L98) ENGINES
TO: ALL CHEVROLET DEALERS
THIS BULLETIN IS BEING REISSUED TO SUPERSEDE PRODUCT CAMPAIGN BULLETIN 85C22 DATED AUGUST, 1986. UPON RECEIPT OF THIS REISSUED BULLETIN 85C22a, DESTROY 85C22.
General Motors has determined certain 1984-1985 Chevrolet Camaro and Monte Carlo models with 5.0L V8 engine and 1984-1985 Chevrolet Corvette models with 5.7L V8 engine may exhibit declining ignition voltage of the high output ignition coil.
High ignition coil temperatures combined with the stress of higher voltage may break down the epoxy coating of the high output ignition coil secondary windings. Declining ignition voltage may lead to engine misfire, hesitation, sags, or no re-start. Correction will consist of
replacing the high output ignition coil and module, revising spark plug gap and installing a spark plug gap revision label.