940 L4-2.3L SOHC VIN 88 B230F (1992)
300 kPa (43 psi) - partial vacuum = system pressure.
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Disconnect the hose from the vacuum pump.
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System pressure should return to 300 kPa (43 psi).
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Continue with Stopping the Fuel Pump.
Stopping the Fuel Pump
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Remove the wire between the relay board terminals 30 and 87/2.
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Reinstall the relay.
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Continue with Checking Residual Pressure.
Checking Residual Pressure
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Pressure must not sink below:
200 kPa (28 psi) in less than 20 minutes.
If residual pressure is OK:
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Proceed to: Disconnecting Pressure Gauge.
If pressure decreases too quickly:
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Check that the injectors or cold start valve are not leaking fuel.
If the valves are OK:
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Try using a new pressure regulator.
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Proceed to: Disconnecting Pressure Gauge.
Disconnecting Pressure Gauge
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Switch Ignition OFF.
