Rear fuel 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.
The pressure must rise to approximately 430 kPa immediately.
If the rear fuel pressure is incorrect, replace the rear pressure regulator which is integrated in the fuel pump (FP).
If the rear fuel pressure is correct and the fuel pressure is incorrect, select the fault tracing path as follows.
A: The rear fuel pressure is normal but rose slowly to approx. 309 kPa. Check if the fuel line is damaged or pinched. If the fuel line is intact, replace the fuel filter.
The fault is remedied.
B: The rear fuel pressure is normal but the pressure immediately rose to a too low/high value. Replace the front pressure regulator.
The fault is remedied.
Disconnect the test equipment.
Reinstall the components in reverse order.