Calais V6-3300 3.3L MFI VIN N (1990)
Idle Speed/Throttle Actuator - Electronic: Customer Interest
Engine - Deceleration Stall or Long Crank on Start Up
NUMBER: 93-T-04
CORP.REF.NO: 206504
DATE: November 1992
SECTION: 6E3
SUBJECT:
NEW IAC MOTOR - DECELERATION STALL AND/OR EXTENDED CRANK ON STARTUP
MODELS/YEARS:
ALL 1988-93 W/3800 (VIN C, L, 1) AND 3300 (VIN N) ENGINES
Some of the models shown in the chart may exhibit a deceleration stall or long crank on startup. This condition can sometimes be viewed on a scan tool
as excessively high IAC counts at idle immediately after startup, or as a failure to return to the same (or similar) IAC counts displayed at idle after
several throttle maneuvers.
If this condition is experienced and currently published service diagnostic procedures indicate a malfunctioning IAC motor, it will be necessary to install
a new IAC motor. Parts are currently available from GMSPO.
It should be noted that two designs of IAC motors exist. The 3800 (VIN L) and the 3800 supercharged (VIN 1) use a triple slope design (see the
illustration). The 3800 (VIN C) and 3300 (VIN N) use a dual slope design. The dual slope and the triple slope designs are not interchangeable. Several
part numbers for IAC motors are being phased out to standardize usage and are being replaced by current production IAC motors listed.
WARRANTY INFORMATION:
See the current Labor Time Guide.
