V6 & V8 Idle Speed
- Warm engine to normal operating temperature (needle in middle of coolant gauge). Check and adjust ignition timing (if necessary). See IGNITION TIMING.
- Check idle speed. If idle speed is not within specification, disconnect Auxiliary Air Control (AAC) valve harness connector. Turn idle speed screw on AAC valve. See IDLE SPEED & CO LEVEL table.
- Reconnect AAC valve harness connector. Run engine at 2000 RPM for about 2 minutes under no load and then return to idle. Idle speed should be as specified.
IDLE SPEED & CO LEVEL
| Application |
Idle RPM |
CO Level |
| G20 |
| TPS Connected |
750-850 |
Less Than 10.0% |
| TPS Disconnected |
700-800 |
Less Than 10.0% |
| M30 |
| AAC Connected |
750-850 |
0.2-8.0% |
| AAC Disconnected |
700 |
0.2-8.0% |
| Q45 |
| AAC Connected |
600-700 |
0.2-8.0% |
| AAC Disconnected |
575-625 |
0.2-8.0% |