Air Flow Meter/Sensor: Adjustments

Airflow Sensor Arrangement:

1. Activate the fuel pumps for 5 seconds in order to zero the sensor plate position.
2. Slip a (0.002in.) feeler gauge between the sensor plate and the cylindrical part of the air funnel.

^ The feeler gauge should be able to be slipped freely around the sensor plate. Recenter the plate if necessary.
^ The air-flow sensor plate should not bind even under slight, lateral pressure.

3. Push down on the sensor plate slightly.
4. Release the sensor plate.

^ The sensor plate should not bind when released and audibly touch the sensor plate stop bracket.

Air Flow Sensor Plate Position:

5. With the engine (OFF) visually inspect the air-flow sensor plate position (vertical) within the air funnel.

^ The air-flow sensor plate upper edge must stand flush with the upper edge of the cylindrical part of the air funnel. A higher position of up to 0.008 in. (0.2mm) is permissible. Adjust the zero point if necessary.

ZERO POINT EXCESSIVELY HIGH

Air Flow Sensor Plate Adjustment:

1. Remove the sensor plate stop bracket.
2. With an appropriate drift carefully drive the dowel pin (arrow) down until the air-flow sensor plate upper edge is flush with the upper edge of the cylindrical part of the air funnel. A higher position of up to 0.008 in. (0.2mm) is permissible.

NOTE: If the dowel pin is driven in too deeply it will be necessary to remove the mixture control unit to correct the adjustment. Refer to ZERO POINT EXCESSIVELY LOW.

3. Reinstall the sensor plate stop bracket.
4. Check the idle speed and air/fuel mixture for accuracy.

ZERO POINT EXCESSIVELY LOW

Air Flow Sensor Adjusting Pin Location:

1. Remove the mixture control unit and sensor plate stop bracket.
2. 2. With an appropriate drift carefully drive the dowel pin (arrow) down until the the air-flow sensor plate upper edge is flush with the upper edge of the cylindrical part of the air funnel. A higher position of up to 0.008 in. (0.2mm) is permissible.

NOTE: Do not drive the pin in too deeply. If the dowel pin is driven in too deeply it will be necessary to correct the adjustment. Excessive use of the dowel pin adjustment may loosen the dowel pin seat.

3. Reinstall the mixture control unit.
4. Check the idle speed and air/fuel mixture for accuracy.