Camaro Z28 V8-305 5.0L VIN F FI (1991)
Throttle Position Sensor: Customer Interest
Engine Controls - MIL ON/Code 22 Stored
Number:
91-60-6E
Section:
6E
Date:
August 1990
Corp. Bulletin No.: 036514
Subject:
THROTTLE POSITION SENSOR (TPS) LOW SPEED DRIVEABILITY
Model and Year:
1991 CAPRICE, CAMARO WITH 5.0L (VIN CODE E) ENGINE
TO:
ALL CHEVROLET DEALERS
Condition:
Some owners of 1991 B and F-cars with the 5.0L V8 engine (VIN E) may comment of a "Service Engine Soon" light with a Code 22 Throttle Position
Sensor (TPS) stored, idle surge, low speed hesitation, or rough idle.
Cause:
Plastic mold flash on the internal contact pads causes incorrect TPS output.
Correction:
Follow the normal diagnostics found in section 6E2-A 6E2-B, and 6E2-C2 of the unit repair manual. If the replacement of the TPS is necessary, use kit
part number 17112404. Do not use any TPS that is Julian date coded prior to C1350. The Julian date of 135 represents May 15 (135th day of the year),
and 0 represents the year 1990 (9=1989).
The Julian date is located on the TPS face, just below the production part number. It can be identified without removing the TPS from the throttle body.
Parts are currently available from GMSPO.
Use applicable labor operations and labor times.
