Engine - Detonation, Cracked Throttle/Cold Driveability
Number: 83-T-57Section: VI
Date: June, 1983
Subject: 1983 "J" CAR SERVICE PROM - REDUCTION OF ENGINE DETONATION, IMPROVEMENT OF CRACKED THROTTLE DRIVEABILITY AND COLD IDLE STABILITY - 2.0L L4 CODE P ENGINE
TO: ALL CHEVROLET DEALERS
On vehicles with build date codes prior to 7-126599 or J-138165, improvement of the conditions listed below can be gained by installation of the service PROM detailed in the illustration below.
The conditions improved with this service PROM include:
^ Engine detonation
^ Cracked throttle driveability
^ Cold idle stability
VEHICLE CONFIGURATION ECM P/N SERVICE PROM
Federal 16029801
All M5 16023561 1226473
M4 W/A/C 16033061
Federal 16033051 1226474
M4 W/O A/C
Federal 16027111
All A3 16032261 1226471
California 16027071 1226477
All M4 & M5
California 16027101 1226475
All A3
Use applicable labor operation.