Engine - Unstable Idle, Tip-in Sag, Hesitation When Cold
Model Year 1983Bulletin No.. 83-232
File In Group 64A
Number 26
Date July '84
SUBJECT: POOR COLD DRIVEABILITY
MODELS AFFECTED: 1983 SKYLARK WITH 2.5L EFI (LR8) ENGINE EQUIPPED WITH 4-SPEED MANUAL TRANSAXLE NATIONAL
Some early 1983 Skylark model vehicles equipped with the 2.5L engine (VIN Code R) and 4-speed manual transaxle may exhibit a rolling unstable idle, tip-in hesitation or stumble while being driven when cold.
If this condition occurs, a new prom has been released for service correction.
Original Prom New Prom
Part No. 1226348 Part No. 1226480
Broadcast Code AXN Broadcast Code CHX
When the new prom is installed, the broadcast code on the paper label affixed to the ECM should be updated in order to reflect this prom change.