Residual Pressure

Residual Pressure

Requirements







- Fuel pressure OK and pressure gauge V.A.G 1318 connected. For checking fuel pressure. Fuel Pressure
- Switch ignition on often until fuel pressure on pressure gauge no longer rises.
- Read fuel pressure on pressure gauge. Specified value: 3.5 to 6.0 bar.
- Watch pressure drop on gauge. After 10 minutes the pressure must not drop below a 3.0 bar decrease.

If pressure drops further:
- Switch ignition on often until fuel pressure on pressure gauge no longer rises.







- Switch ignition off and immediately close pressure gauge shutoff valve. Lever will then point in position - B -.

If pressure drops again:
(Leak on engine side)
- Check fuel pipe to high pressure pump for leaks.

If no malfunction can be found:
- Replace high pressure pump.

If pressure no longer drops:
(Leak on fuel tank side)
- Check fuel line to flange for leaks.

If no malfunctions are found on fuel line:
- Check-valve in flange with fuel filter malfunctioning, replace flange with fuel filter.