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Home >> Volkswagen >> 1987 >> Fox L4-1781cc 1.8L SOHC >> Repair and Diagnosis >> Powertrain Management >> Tune-up and Engine Performance Checks >> Fuel Pressure >> Specifications
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Fuel Pressure: Specifications

DIFFERENTIAL PRESSURE REGULATOR
pressure with harness connector disconnected should be 2.9 to 7.0 psi (0.2 to 0.5 bar) less than system pressure

DIFFERENTIAL PRESSURE REGULATOR
pressure with harness connector connected (15k ohm tool connected to coolant temperature sensor connector) should be 10 to 17.5 psi (0.7 to 1.2 bar) less than system pressure

FUEL INJECTOR
opening pressure 44 to 59 psi (3.0 to 4.1 bar)

RESIDUAL PRESSURE
after 10 minutes 37.7 psi (2.6 bar)

SYSTEM PRESSURE 75 to 82 psi (5.2 to 5.6 bar)