Engine - Cold Hesitation/Backfire/Rough Idle
90chevy06IMPROVED COLD DRIVEABILITY 1982 "B" AND "G" VEHICLES WITH 3.8L V6 ENGINE (RPO LC3)
NUMBER: 82-T-57
SECTION: VIM
DATE: APRIL, 1982
TO: ALL CHEVROLET DEALERS
Some 1982 3.8L engines may encounter cold driveability conditions such as hesitation or backfire during the first 1.0 mile of driving. Unstable or rough idle has also been encountered on some "B" cars with the LC3 engine.
A new PROM has been released for service for two (2) purposes:
(1) to improve cold driveability in .3 to 1.0 mile range.
(2) to increase curb idle speed from 550 rpm to 600 rpm in drive, A/C off in "B" cars only.
The following chart gives the PROM usage.