Air Flow Meter/Sensor: Adjustments

Centering Air Flow Sensor Plate:

If the Air Flow Sensor plate binds in the air cone, remove the bolt in the center of the sensor plate. Apply thread locking compound to the bolt and reinstall it, centering the sensor plate before tightening the bolt.

Air Flow Sensor Plate Clamping Bolt:

If the plate cannot be centered, separate the air flow sensor housing from the air cleaner housing by releasing the wire clamps. Remove the clamp bolt from the end of the air flow sensor lever. Coat the bolt threads with thread locking compound and reinstall the bolt hand-tight. Center the air flow sensor lever on the shaft and tighten the clamping bolt. Reinstall and center the air flow sensor plate as described above.

Air Flow Sensor Plate Rest Position:

Check the air flow sensor plate rest position with the engine at normal operating temperature. When correctly adjusted, the sensor plate should be:

0.075in. (1.9mm)

Below the narrowest point of the air cone. Up to:

0.118in. (3.0mm) is permissible

Air Flow Sensor Plate Adjustment Screw:

Adjust the rest position using the adjusting screw under the air flow sensor plate.

Air Flow Sensor Plate Basic Adjustment:

To check the air flow sensor level basic adjustment, measure the distance from the fuel distributor mounting surface to the sensor plate roller when the sensor plate is at rest. The height should be:

0.74in. ± 0.004in. (18.8mm ± 0.1mm)

If the height is incorrect remove the tamper-proof plug in the top of the air flow sensor housing and turn the idle mixture adjusting screw, using a 3 mm hex wrench, until the measurement is correct.

NOTE: This basic adjustment is only a starting point. The adjustment is likely to change during the final step of checking and adjusting the idle mixture. If any adjustments or repairs are made to the fuel distributor or air flow sensor plate level, the idle mixture and idle speed must be checked.