ADJUSTING IDLE SPEED 1985.5-1989

Adjusting Requirements
Idle speed specification: 840 ą 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).

2. Check CO level. If CO level is not within specified limits, it must be corrected on the air flow sensor.

	CO level specification: 0.5 to 1.5 % by vol.
	Turn clockwise for a richer mixture.
	Turn counterclockwise for a leaner mixture.

88_pcbs.jpg (45172 bytes) 3. Connect a tachometer.
Idle speed specification: 840 ą 20 rpm.

4. Disable the Idle Control Valve. Jumper B and C on test connector.

5. Turn the air bypass screw on throttle housing until tachometer reads 840 ą 20 rpm.

6. Restore the operation of the Idle Control Valve by remove jumper on test connector.

7. Recheck adjusted values.

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