Passat L4-1984cc 2.0L DOHC (1991)
Air Flow Meter/Sensor: Testing and Inspection
Air Flow Sensor, Checking and Adjusting
Air Flow Sensor, Checking and Adjusting
WARNING: Fire Hazard! Do not smoke or have anything in area that can ignite fuel.
Sensor plate lever and control plunger, checking
-
pull injectors out of inserts and place in openings of VAG 1348/2B fuel analyzer
-
operate either starter or remote control VAG 1348/3A for approx. 10 seconds
-
check quality of sensor plate lever movement by lifting sensor plate bolt using magnet
-
sensor plate lever must exhibit same resistance over entire travel
-
pull sensor plate upward with a quick movement using a magnet on the sensor plate bolt
-
no change in lever resistance should be felt
If YES
-
replace air flow sensor assembly
If sensor plate lever is difficult to move upward but moves downward easily
-
replace fuel distributor
-
control plunger is hanging up
Sensor plate rest position, checking
-
upper edge of sensor plate must be dimension "a" below cone edge of venturi
-
a = 1.9 + 1.1 mm
Sensor plate rest position, adjusting
-
remove upper section of air filter housing and remove air filter element