volvo Workshop Repair Guides

Volvo Workshop Service and Repair Manuals

Checking the Fuel Pressure While Driving|Page 9842 > < Checking the Fuel Pressure While Driving|Page 9840
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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.

Checking the residual pressure

Checking the Fuel Pressure While Driving|Page 9842 > < Checking the Fuel Pressure While Driving|Page 9840