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Home >> Eagle >> 1988 >> Medallion LX, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> MPFI System >> Component Testing >> Fuel Pump >> Fuel Pump Pressure

Fuel Pump Pressure

  1. Disconnect hose from fuel pressure regulator to fuel rail. Connect fuel pressure gauge to fuel rail. Disconnect vacuum hose from pressure regulator and connect vacuum pump.
  2. Start engine. Check and record pressure reading. Pressure should be 33-39 psi (2.3-2.7 kg/cm2 ).
  3. Apply 15 in. Hg of vacuum to pressure regulator. Fuel pressure should drop to 26-31 psi (1.8-2.2 kg/cm2 ).
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