Golf GTI L4-1984cc 2.0L DOHC (9A) (1990)
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