940 L4-2.3L SOHC VIN 88 B230F (1992)
Important: Do not let pressure exceed 600 kPa (85 psi).
If the pressure rises quickly:
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The pump and pipes are OK.
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Try using a new pressure regulator.
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Check that system pressure is normal.
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To disconnect, continue to Disconnecting Pressure Gauge.
If pressure rises slowly:
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Check the fuel filter, tank pump strainer and fuel line for blockages.
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Check that system pressure is normal.
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To disconnect, continue to Disconnecting Pressure Gauge.
If pressure does not rise:
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Try using a new Fuel Pump.
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Check that system pressure is normal.
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To disconnect, continue to Disconnecting Pressure Gauge.
System Pressure Too High
^
Switch ignition OFF.
^
Remove the wire from the Fuel Pump relay board.
^
Remove the return line from the pressure regulator. Blow into the line.
If the line is OK:
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Try using a new pressure regulator.
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Check that system pressure is normal.
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To disconnect, continue with Disconnecting Pressure Gauge.
If the line is blocked:
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Check the line for pinching and clogging.
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Check that system pressure is normal.
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To disconnect, continue with Disconnecting Pressure Gauge.
Checking Pressure Regulator
Checking the Pressure Regulator
^
Connect a vacuum pump to the pressure regulator. Use vacuum pump 5843 for example.
^
Pump the air out of the regulator.
^
Check that system pressure decreases as much as the pressure in the regulator.
