Passat Sedan L4-1781cc 1.8L Turbo (AEB) (1999)
Fuel Pressure: Testing and Inspection
The fuel pressure regulator controls the fuel pressure dependent upon intake manifold pressure.
Special tools, testers, measuring instruments and auxiliary items required:
-
VAG 1318 Pressure tester
-
1318/6 adaptor
-
1318/7 adaptor
Test conditions:
-
Fuel pump delivery rate OK
WARNING!
-
Fire Hazard! Do NOT have anything in area that can ignite fuel!
-
Fuel system is under pressure! Before opening the system place a cloth around the connection. Then release pressure by carefully
loosening the connection.
Test sequence:
-
Open the union -arrow- and catch escaping fuel with a cloth.
-
Connect pressure gauge VAG 1318 to fuel supply pipe -1- and to fuel rail using adaptors 1318/6 and 1318/7.
-
Open shut-off tap on pressure gauge.
-
Handle points in direction of flow
-
Start the engine and run at idling speed.
-
Measure fuel pressure.
-
Specification: Approx. 3.5 bar
If specification obtained:
-
Disconnect the vacuum hose off fuel pressure regulator -arrow-
-
Fuel pressure must increase to approx. 4.0 bar