Workshop Repair Manuals

Volvo Workshop Manuals

[PREV PAGE] [NEXT PAGE]

volvo Workshop Repair Guides


V90 L6-2.9L VIN 96 B6304S (1998)

Engine, Cooling and Exhaust > Engine > Tune-up and Engine Performance Checks > Fuel Pressure > System Information > System Diagnosis > Testing Notes > Page 1257

Page 3
background image

Pressure section above.

Line Pressure Too High

-

Disconnect jumper cable between relay base terminals 1 and 3.

-

Disconnect return line from pressure regulator. Blow into line.

If the cable is OK:
^

Try a new pressure regulator. Then measure line pressure. Proceed to: Measuring Line Pressure section above.

If the line is blocked:
^

Check if the return line is blocked, clean/replace. Then measure line pressure. Proceed to: Measuring Line Pressure section above.

Checking Fuel Filter

-

Squeeze the return line and check is the pressure rises.

CAUTION:  Do not allow pressure to exceed 600 kPa (6.0 kp/cm2)(85.3 psi).

If pressure rises rapidly:
^

Proceed to: Checking Pressure Regulator, Lowering Pressure section below.

If pressure rises slowly:
^

Replace fuel filter.

Engine, Cooling and Exhaust > Engine > Tune-up and Engine Performance Checks > Fuel Pressure > System Information > System Diagnosis > Testing Notes > Page 1257

[PREV PAGE] [NEXT PAGE]