Firenza L4-121 2.0L VIN K TBI (1987)
Ignition Coil: Customer Interest
Rear Engine Lift/Coil Mounting Bracket - Breakage
SUBJECT:
REAR ENGINE LIFT/COIL MOUNTING BRACKET NUMBER: 87-C-07
AND COIL WIRE SHIELD
DATE: Oct. 15, 1987
MODELS/YEARS:
CERTAIN 1987 FIRENZA MODELS EQUIPPED
SECTION: 6D
WITH 2.0L LT2(VIN CODE K) ENGINE
CONDITION
General Motors has determined that some 1987 Firenza models may experience fatigue fracture of the rear engine lift bracket. The ignition coil and coil
bracket is mounted to the rear engine lift bracket. If the lift bracket fractures, the coil may become unsupported. This condition may ultimately result in
engine misfire and possible loss of engine operation.
Additionally, high frequency magnetic coupling between the ignition coil and distributor coil magnetic pickup can result in extra pulses in the RPM
reference signal. This condition may cause extended cold cranking/no start, pop back during cranking and/or occasional "Service Engine Soon" light
with stored code 42.
VEHICLES INVOLVED
Certain 1987 Firenza models equipped with 2.0L LT2 (VIN CODE K) engines within the following vehicle breakpoints:
Plant
Beginning
Through and Including
Service Required
Leeds
Start of Production
HK311896
Lift Bracket Pencil
Brace and Coil Wire Shield
Leeds
HK311897
HK320176
Coil Wire Shield
Only
DEALER ACTION
To protect against fatigue fracture of the rear engine lift bracket, the lift bracket will be inspected and, if necessary, replaced. Additionally, a pencil brace
(service kit) will be reinstalled as required on involved vehicles.
To prevent the possibility of magnetic coupling between the ignition coil and the distributor coil magnetic pickup, a coil wire shield will be installed on
all vehicles involved.
Dealers are to service all vehicles subject to this campaign at no charge to owners, regardless of mileage, age of vehicle, or ownership from this time
forward.
Whenever a vehicle subject to this campaign is taken into your new or used vehicle inventory, or it is in your dealership for service in the future, you
should take the steps necessary to be sure the campaign correction has been made before reselling or releasing the vehicle.
Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the dealer and arrangements made to make the required
modification according to instructions contained in this bulletin.