GTI L4-2.0L Turbo (BPY) (2007)
Fuel Pressure: Testing and Inspection
Checking Fuel Pressure
Checking Fuel Pressure
Special tools, testers and auxiliary items required
-
High pressure fuel gauge
CAUTION: Fuel supply line is under pressure. Wear protective goggles and protective clothing to prevent injuries and contact with skin.
Before loosening hose connections, place rags around the connection point. Then release pressure by carefully pulling on hose.
-
Remove the fuel supply line -2- and catch leaking fuel using a rag.
-
Install a High pressure fuel gauge in place of the fuel supply line.
-
Open the shut-off valve of the High pressure fuel gauge.
-
Switch the ignition on and off until the fuel pressure on no longer rises.
-
Check the indicated fuel pressure on the High pressure fuel gauge.
Specified value: 3.5 to 5.0 bar.
If the fuel pressure is OK, check the residual pressure. See: Checking Residual Pressure
If specified value is obtained:
-
Check the return line between the fuel filter and the fuel pump for kinks and blockage.
If no malfunction is found in the return line between the fuel filter and the fuel pump:
-
The pressure relief valve in the fuel filter is malfunctioning, replace the fuel filter.
If specified value is not obtained:
-
Check the fuel pressure in front of the fuel filter.