Checking the residual pressure

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Checking Residual Fuel Pressure

Courtesy of VOLVO CARS OF NORTH AMERICA.

The starting pressure is 309 kPa

Switch off the engine.

Note the time.

The fuel pressure must not be lower than 200 kPa for 20 minutes.

HINT: Too low residual pressure can be caused by leakage in the injectors, the check valve in the fuel pump or leakage in the pressure regulators.

Remove the test equipment from the car. Return the equipment to the tool board.

Reinstall the removed components and the cap on the Schrader valve.

Fig 2: Removing Guard

Courtesy of VOLVO CARS OF NORTH AMERICA.

NOTE:

The rear fuel pressure measurement test must only be carried out if the result of the Fuel pressure measurement is in accordance with A or B.

Raise the car.

Remove the guard.

Fig 3: Opening Clamp For Fuel Filter And Fastening Nipple Into Place On Schrader Valve

Courtesy of VOLVO CARS OF NORTH AMERICA.

WARNING:

The fuel filter must not hang from the fuel lines during this test. Secure the fuel filter using tie straps.

Slacken off and open the clamp for the fuel filter (1)

Carefully work the filter downwards.

Remove the cap on the Schrader valve.

Screw nipple J-41031-A (2) into place on the Schrader valve.

Fig 4: Hanging Pressure Gauge

Courtesy of VOLVO CARS OF NORTH AMERICA.

NOTE:

Hang the pressure gauge so that the value can be read off easily when the car has been lowered.

Lower the car.