V90 L6-2.9L VIN 96 B6304S (1998)
Checking Pressure Regulator, Lowering Pressure
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Connect vacuum pump 999 5843 to pressure regulator.
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Pump air out of regulator.
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Check that line pressure rises by the same amount as the pressure in the regulator drops. 300 kpa (42.6 psi) - negative pressure = line pressure.
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Disconnect hose from pressure tester. Line pressure should return to 300 kPa (42.6 psi).
If pressure is OK:
^
Proceed to: Checking Pressure Regulator, Increasing Pressure section below.
If pressure is NOT OK:
^
Replace pressure regulator.
Checking Pressure Regulator, Increasing Pressure
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Connect pressure tester 998 5496 and manometer 999 5230 to pressure regulator.
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Pump up the pressure in the regulator.
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Check that line pressure rises by the same amount as the pressure in the regulator. 300 kpa (42.6 psi) - negative pressure = line pressure.
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Disconnect hose from pressure tester. Line pressure should return to 300 kPa (42.6 psi).
If pressure is OK:
^
Proceed to: Checking Residual Pressure section below.
If pressure is NOT OK:
^
Replace pressure regulator.