Firenza L4-121 2.0L (1983)
Technical Service Bulletin # 83C09
Date: 871101
Campaign - Pulsair Check Valve Assembly Corrosion
SUBJECT:
PULSAIR CHECK VALVE ASSEMBLY CORROSION
CERTAIN 1983 FIRENZA MODELS EQUIPPED WITH 2.0L LQ5 (VIN CODE P) AND AUTOMATIC
MODELS/YEARS:
TRANSMISSION (FEDERAL EMISSIONS)
OR 2.0L LQ5 WITH AUTOMATIC AND MANUAL TRANSMISSION (CALIFORNIA EMISSIONS)
INFO IN THIS BULLENTIN HAS BEEN REVISED BY 83C09A6E, DATED 04/08/88, WHICH HAS BEEN DELETED
NUMBER:
83-C-09
DATE:
Nov. 10, 1987
SECTION:
6E
Condition, Vehicles Involved, Dealer Action & Service Procedure Information
CONDITION
General Motors has determined that a defect which relates to motor vehicle safety may exist in some 1983 model year Oldsmobile Firenza. Internal
corrosion of the pulsair chock valve assembly can permit exhaust gas to flow upstream to the plastic shut off valve possibly melting the valve. It could
then be possible for a piece of the malted shut off valve to be drawn into the air cleaner, and subsequently into the throttle body where it could lodge
against the throttle plate. If this condition were to occur, the engine may not return to idle upon release of the accelerator pedal. Although the vehicle can
still be stopped with the service brake, loss of accelerator control could result in a vehicle crash without prior warning.
VEHICLES INVOLVED
Certain 1983 Oldsmobile Firenza models equippped with:
2.0L LQ5 (VIN Code P) engines and automatic transmissions (Federal Emissions)
2.0L LQ5 (V IN Code P) engine with manual or automatic transmissions (California Emissions)
Within the following vehicle breakpoints:
Year
Series
Plant
Beginning
Through and Including
1983
Firenza
Leeds
Start of Production
DK325799
DEALER ACTION
To prevent this condition from occuring, it will be necessary to inspect and, when necessary replace the following:
A.
Pulsair Check Valve Assembly with an assembly incorporating stainless steel components.
B.
Pulsair Shut-off Valve with a newly designed valve.
Dealers are to perform this campaign on all involved vehicles 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 car inventory, or it is in your dealership for service, you are to ensure the
campaign correction has been made before selling or releasing the vehicle.
