1985 Corvette: Service Bulletin: High Output Ignition Coil Replacement
Subject: High Output Ignition Coil Replacement
Model and Year: 1985 L69 Camaro and Monte Carlo, 1985 LB9 Camaro and 1985 L98 Corvette
Source: Chevrolet Service Bulletin
Bulletin Number: 85-93 - June, 1985
TO: ALL CHEVROLET DEALERS
Some 1985 Camaro, Monte Carlo and Corvettes with high output ignition coils may exhibit driveability problems ranging from hesitations, sags, and stumbles to complete ignition cut-out. These conditions my be caused by extended exposure to high temperatures.
Should any vehicle/engine combination stated above experience the described driveability conditions and normal service procedures (See Service Manual) do not correct the conditions, the following steps are to be taken to prevent future reoccurrence:
- Replace the high output coil and distributor module with standard output coil and module as listed below:
Model Year Vehicle Model Engine RPO Replacement Coil Replacement Module 1985 Camaro, Monte Carlo L69 1985473 1976908 1985 Camaro LB9 1985473 1976908 1985 Corvette L98 1985474 1976908
- Remove and regap spark plugs to .035 inch.
- Check and reset ignition timing to specifications as indicated on the vehicle emissions label.
FOR 1985 ONLY
|Camaro With L69 and NA5
|Camaro With L69 and NB2
|Camaro With LB9 and NA5
|Camaro With LB9 and NB2
|Monte Carlo with L69 and NA5
|Monte Carlo with L69 and NB2
|Corvette with L98 and NA5 Less NN5
|Corvette with L98 and NA5 With NN5
|Corvette with L98 and NM8
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
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