Engine - Minimum Idle Speed Adjustment
Number 86-6 (Gasoline) - 42 Date 5/86Subject: MINIMUM SPEED ADJUSTMENT ON 1986 3.0L V6 ENGINES
GRAND AM MODELS
The minimum idle speed adjustment procedures for the 3.0L V-6 engine on page 6E3-C2-7 of the 1986 Grand Am Service Manual is incorrect. Following is the correct procedure to adjust the minimum idle speed (note change in TPS adjustment specification).
1. With IAC motor connected, ground diagnostic lead.
2. Turn on ignition, do not start engine. Wait at least 30 seconds.
3. With ignition "on", disconnect IAC electrical connector.
4. Remove ground from diagnostic lead and start engine.
5. Adjust idle stop screw to 500 plus/minus 50 rpm in drive.
6. Turn ignition "off" and reconnect connector at IAC connector.
7. Adjust TPS to:
.40 plus/minus .05 volts
8. Recheck setting.
9. Start engine and inspect for proper idle operation.