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volvo Workshop Repair Guides


V90 L6-2.9L VIN 96 B6304S (1998)

Powertrain Management > Fuel Delivery and Air Induction > Fuel Pressure > System Information > System Diagnosis > Testing Notes > Page 1942

Page 5
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Checking Residual Pressure

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Switch off ignition between terminals 1 and 3 on the relay base.

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Reinstall fuel pump relay.

NOTE:  The value must not drop below 200 kPa (28.5 psi) in less than 20 minutes.

If the residual pressure is OK:
^

Proceed to: Disconnecting Pressure Gauge section below.

If residual pressure is NOT OK:
^

Fault may be due to leakage from injectors, connections, fuel pump non-return valve or lines. Repair as necessary.

Disconnecting Pressure Gauge

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Ignition off.

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Start draining unit.

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Turn pressure gauge cock to mid-position.

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Lock adapter (valve closed as in picture 1).

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Disconnect adapter from valve.

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Stop draining unit.

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Reinstall equipment.

CAUTION:  Remember to reinstall valve safety cap.

Powertrain Management > Fuel Delivery and Air Induction > Fuel Pressure > System Information > System Diagnosis > Testing Notes > Page 1942

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