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940 L4-2.3L SOHC VIN 88 B230F (1992)

Engine, Cooling and Exhaust > Engine > Tune-up and Engine Performance Checks > Fuel Pressure > System Information > Specifications > Page 3456

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300 kPa (43 psi) - partial vacuum = system pressure.

^

Disconnect the hose from the vacuum pump.

^

System pressure should return to 300 kPa (43 psi).

^

Continue with Stopping the Fuel Pump.

Stopping the Fuel Pump
^

Remove the wire between the relay board terminals 30 and 87/2

^

Reinstall the relay.

^

Continue with Checking Residual Pressure.

Checking Residual Pressure
^

Pressure must not sink below:

200 kPa (28 psi) in less than 20 minutes.

If residual pressure is OK:
-

Proceed to: Disconnecting Pressure Gauge.

If pressure decreases too quickly:
-

Check that the injectors or cold start valve are not leaking fuel.

If the valves are OK:
-

Try using a new pressure regulator.

-

Proceed to: Disconnecting Pressure Gauge.

Disconnecting Pressure Gauge
^

Switch Ignition OFF.

Engine, Cooling and Exhaust > Engine > Tune-up and Engine Performance Checks > Fuel Pressure > System Information > Specifications > Page 3456

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