ADJUSTING IDLE SPEED Porsche 944/924S 1985.5-1989
Adjusting Requirements
Idle speed specification: 840 ± 20
rpm.
 | Engine in perfect running condition. |
| Electric equipment switched off for duration of adjustments. |
| Adjustments carried out quickly to avoid excessive intake heat & incorrect CO level. |
| Ambient temperature 15 to 35° C.
|
|
1. Run engine to operating temperature (70°C to 90°C oil temperature). |
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3. Locate the Test Connector, located on the drivers side firewall. Disable the Idle Control Valve. Jumper B and C on Test Connector. 4. Turn the air bypass screw on throttle housing until tachometer reads 840 ± 20 rpm. 5. Restore the operation of the Idle Control Valve by remove jumper on test connector. 6. Recheck adjusted values.
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2.
Connect a tachometer. 
