Passat L4-1984cc 2.0L DOHC (1991)
Air Flow Sensor
1
Flap on air flow sensor closed or air flow sensor plate at rest position. Resistance increases as flap or plate opens.
2
Flap on air flow sensor opened to maximum or air flow plate deflected to maximum.
Carbon Canister Freq. Valve
Cold Start Injector
ISC Valve