Front pressure regulator, B4XX4T
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.
CAUTION:
When applying vacuum or pressure to the regulator, do not exceed the pressure values stated.
Damage to the diaphragm in the regulator may occur.
Connect pump 999 5757 to the regulator.
Pump up a vacuum.
The pressure reading should go down.
Fuel pressure must not be lowered below 240 kPa.
Release the vacuum.
The pressure should rise to approximately 309 kPa immediately.
Pump up the pressure.
The pressure reading should go up.
Fuel pressure must not be raised above 380 kPa
Release the pressure.
The pressure should return to approximately 309 kPa immediately.
Continue with "Check the residual pressure"(7).
If the pressure regulator is not functioning correctly, replace the front pressure regulator.