960 L6-3.0L VIN 95 B6304F (1993)
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Clamp together return lead and check if pressure rises.
NOTE: Pressure must not exceed 600 kPa (6.0 kp/cm2) (87.0 psi).
If pressure rises rapidly:
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Check pressure regulator, loss of pressure.
If pressure rises slowly:
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Change fuel filter.
Check Pressure Regulator, Loss of Pressure
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Connect vacuum pump P/N 9995843 to pressure regulator.
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Pump out air from regulator.
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Check that system pressure at same rate as regulator pressure.
300 kPa - negative pressure = system pressure.
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Disconnect hose from vacuum pump.
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System pressure should return to 300 kPa (43.5 psi).
If pressure is OK:
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Check pressure regulator, Increase in pressure.
If pressure is NOT OK:
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Change pressure regulator.
Check Pressure Regulator, Increase in Pressure
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Connect vacuum pump P/N 9995843 and manometer P/N 9995230 to pressure regulator.
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Pump up regulator pressure.
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Check that system pressure rises as same rate as regulator pressure.
300 kPa - negative pressure = system pressure.
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Disconnect hose from pressure tester.
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System pressure should return to 300 kPa (43.5 psi).
If pressure is OK:
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Check residual pressure.
If pressure is NOT OK:
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Change pressure regulator.
Check Residual Pressure