Residual Pressure, Checking

Residual Pressure, Checking







- Fuel pressure OK and pressure gauge V.A.G 1318 connected. Checking fuel pressure.

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







- Close the shut-off valve on the pressure gauge as soon as pressure accumulates. Then lever then points perpendicular to flow direction - arrow -.

If the 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 Now
(Leak on fuel tank side)
- (Leak on fuel tank side)

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