Airflow Sensor (Cis-E)
- Start engine to pressurize fuel system. Turn engine off and remove intake boot from top of airflow sensor. Disconnect coil secondary wire at coil and jumper secondary wire to ground.
- Check sensor play by slowly moving sensor plate through travel range with a magnet. See Fig 1
. Resistance should be felt. Move plate back to rest position. There should be no resistance. If binding is felt, loosen sensor plate hold-down bolt and adjust sensor plate to center of venturi.
- If resistance is uneven, remove airflow sensor from housing and clean and lubricate lever assembly. If resistance is caused by control plunger, remove and clean control plunger assembly. If binding continues, replace fuel distributor.
- Check position of airflow sensor plate. Airflow sensor plate edge must be within .075" (1.9 mm) below narrowest section of venturi. If plate is not positioned as specified, bend sensor spring until correct specification is obtained. Ensure a small gap is present between sensor lever and control plunger.
Courtesy of VOLKSWAGEN UNITED STATES, INC.