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 | (1) Idle RPM | CO Level | |||||
|---|---|---|---|---|---|---|---|
| G20 | |||||||
| TPS Connected | 750-850 | (2) Less Than 10.0% | |||||
| TPS Disconnected | 700-800 | (2) 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% | |||||
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