Residual Pressure, Checking

Special tools and workshop equipment required 

• Switched remote control (jumper).
• Multimeter.
• Electrical connector test lead set.
• Fuel pressure gauge.

Test procedure 

-- Observe safety precautions. Refer to SAFETY PRECAUTIONS 

-- Observe Clean Working Conditions. Refer to CLEAN WORKING CONDITIONS 

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Test conditions 

• The pressure gauge remains connected from Fuel Pressure test.
• Fuel pressure of approx. 5.6 bar should be displayed on pressure tester.
• 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 gauge. Then lever the points perpendicular to flow direction -arrow-.

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 flange assembly for leaks.

-- Check all additional fuel lines in fuel tank for leaks.

If no malfunctions are found on fuel line:

-- Pressure relief valve in flange assembly faulty.

-- Replace flange assembly which contains the pressure relief valve.