Idle Speed
CAUTION:
DO NOT
attempt to adjust throttle stop screw to adjust idle. Throttle stop screw is factory-set and is used as zero reference point for all other adjustments.
NOTE:
DO NOT
adjust idle speed in areas above 8200 ft. elevation.
- Idle speed is controlled by PCM using an IAC valve and requires no adjustments under normal conditions. If conditions require idle speed to be adjusted, start engine and allow it to reach normal operating temperature. Turn all accessories off.
- Ensure all fuel and emission control system wire connectors and hoses are properly connected. Ensure accelerator cable has free-play, air cleaner and ducts are properly installed and air filter element is in good condition. Ensure ignition timing is correct.
- Locate test connector beside battery in relay box. Using a fused jumper wire, ground terminal "B". See Figure
. Attach a duty meter to terminals "D" and "F" of test connector. Remove cap and turn idle speed adjusting screw to obtain correct idle speed. Refer to the IDLE SPEED SPECIFICATIONS
and IAC DUTY AT SPECIFIED IDLE SPEED
tables. On vehicles with A/C, verify idle speed is 850-950 RPM with A/C turned on. If idle speed with A/C turned on is not within specification, check operation of Idle Air Control (IAC) valve. Also, see appropriate SYSTEM/COMPONENT TESTS
article.
IDLE SPEED SPECIFICATIONS
| Application |
Idle RPM |
| A/C Off |
| Auto. Transaxle |
750-850 |
| Man. Transaxle |
700-800 |
| A/C On |
850-950 |
IAC DUTY AT SPECIFIED IDLE SPEED
| Application |
Percent |
| Esteem |
30 |