Residual Pressure, Checking

Residual Pressure, Checking

Test conditions
- The Pressure Gauge remains connected. Fuel Pressure, Checking
- Fuel pressure of approx. 5.6 bar is displayed on pressure tester, checking. Fuel Pressure, Checking
- Hand held remote starter (jumper) is connected.

Test sequence
- Watch pressure drop on gauge. After 10 minutes pressure must not drop below a 4.0 bar decrease.

If pressure drops below 4.0 bar:
- Operate Hand held remote starter (jumper) while doing this, observe display of pressure tester.

Fuel pressure must increase up to a maximum pressure of 6 bar.







- Release control button of Hand held remote starter (jumper) and immediately close shut-off valve of pressure tester. Then lever the points perpendicular to flow direction - arrow -.

NOTE: When releasing control button of Hand held remote starter (jumper), fuel pressure decreases to approx. 5.6 bar.

If pressure drops below 4.0 bar again:
(Leak on fuel tank side)
- Check connections to fuel tank for leaks.

If no malfunction can be found:
- Check fuel filter for leaks.
- Check fuel line to sensor flange for leaks.
- Check all additional fuel lines in fuel tank for leaks.

If no malfunctions are found on fuel line:
- Pressure relief valve in fuel delivery unit flange faulty.
- Replace sensor flange which contains the pressure relief valve.