A4 Quattro Wagon L4-1.8L Turbo (ATW) (2000)
Fuel Pressure: Testing and Inspection
System Pressure, Fuel Pressure Regulator And Residual Pressure, Checking
NOTE: Fuel pressure regulator regulates fuel pressure according to intake manifold pressure. This ensures that the pressure drop at the fuel injectors
remains the same for each speed and load range of the engine.
Special tools and equipment
-
VAG1318
-
V.A.G 1318 with V.A.G 1318/11 adapter, V.A.G 1318/12 pressure hose with connectors and V.A.G 1318/13 adapter
Test requirements:
-
Fuel Pump (FP) relay OK See: Fuel Pump Relay/Testing and Inspection
-
Fuel Pump (FP) OK.
-
Fuel filter OK
-
Battery voltage at least 12.7 V
-
Vehicles with automatic transmission Selector lever in P or N.
Checking system pressure
-
Open fuel filler flap briefly (pressure release).
-
Remove engine cover (arrows).
WARNING!
Fuel system is under pressure! Before opening system, place rags around the connection point. Then release pressure by carefully loosening
connection.