System Components

Air Flow Sensor Plate -- On Right Front Of Engine Compartment
Air Flow Sensor (Potentiometer) -- On Air Intake Side Of The Mixture Control Unit
Altitude Sensor (16 Valve) -- In Tray Area, Left Rear Of Engine Compartment
Coolant Temperature Sensor -- On Coolant Outlet Flange, Left Side Engine Between Cylinder 3 & 4 (JETTA/GOLF)
Coolant Temperature Sensor -- Bottom Right Of Cylinder Head, On Coolant Outlet (?)
Coolant Temperature Sensor -- Both Sensors On Left End Of Cylinder Head, On Coolant Flange (16 Valve)
Cold Start Valve -- Left Front End Of Intake Manifold
Cold Start Valve (16 Valve) -- Left Lower End Of Intake Manifold Port
Diaphragm Pressure Regulator -- Next To The Air/Fuel Mixture Control Unit
Differential Pressure Regulator -- On Side Of Fuel Distributor
Fuel Injection Control Unit (16 Valve) -- In Tray Area, At Left Rear Of Engine Compartment
Fuel Injection Control Unit -- On Plenum Panel, At Rear Of Engine
Fuel Injectors -- On Intake Manifold Ports Of The Cylinder Head
Fuel Distributor -- Fuel Side Of Mixture Control Unit, At Right Front Of Engine Compartment
Fuel Injector Temperature Sensor -- On Coolant Outlet Flange, Left Side Of Engine Between Cylinders 3 & 4
Fuel Injector Temperature Sensor -- On Coolant Outlet Flange, Right Side Of Engine, By Cylinder 1 (?)
Full Throttle Switch -- Top Of Throttle Body By The Throttle Valve
Hall Sender -- On Distributor
Hall Effect Control Unit -- Left Rear Of Engine Compartment
Ignition Control Unit -- Left Rear Of Engine Compartment
Idle Throttle Switch -- Bottom Of Throttle Body
Idle Stabilizer Valve -- On Intake Manifold
Idle Stabilizer Control Unit -- Left Rear Of Engine Compartment
Idle Air Bypass Adjusting Screw -- On Side Of Throttle Body
Knock Sensor Control Unit -- Left Rear Of Engine Compartment
Knock Sensor Control Unit -- Rear Of Engine Compartment
Knock Sensor -- Front Of Engine Block Between Cylinder 1 & 2, Under Intake Manifold
Oxygen Sensor -- On Exhaust Manifold
Thermo-Time Switch -- On Top Of Coolant Outlet Flanges, Between Cylinders 1 & 2
Thermo-Time Switch (16 Valve) -- Left End Of Cylinder Head Next To The Coolant Temperature Sensor, Just Below Distributor
Thermo-Time Switch -- On Coolant Outlet Flange, Left Side Of Engine Between Cylinders 3 & 4
TCI-H Ignition Control Unit -- On Plenum Panel, Near Wiper Motor