Checking pressure regulator, pressure reduction

WARNING: This page is about a different car, the 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Connect vacuum pump 9995843 to pressure regulator.
Pump air out of the regulator.
- Check that line pressure drops by the same amount as the pressure in the regulator drops.
- 300 kpa - negative pressure = line pressure
- Disconnect the hose from the vacuum pump.
Fig 1: Verifying Line Pressure Drop Equals Regulator Pressure Drop
Courtesy of VOLVO CARS OF NORTH AMERICA.

Line pressure should return to 300 kPa.

OK
Refer to Checking pressure regulator, pressure increase
NOT OK
Refer to Information

Connect vacuum pump 9995843 to pressure regulator.
Pump air out of the regulator.
- Check that line pressure drops by the same amount as the pressure in the regulator drops.
- 300 kpa - negative pressure = line pressure
- Disconnect the hose from the vacuum pump.
Fig 1: Verifying Line Pressure Drop Equals Regulator Pressure Drop
Courtesy of VOLVO CARS OF NORTH AMERICA.

Line pressure should return to 300 kPa.

OK
Refer to Stop fuel pump (FP)
NOT OK
Refer to Information