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Home >> Jeep >> 1992 >> Cherokee Laredo, 4D Utility, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System >> Fuel Pressure >> Deadhead Pressure
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Deadhead Pressure

  1. Relieve fuel pressure. See FUEL PRESSURE RELEASE. Connect a 0-60 psi (0-4.2 kg/cm2 ) fuel pressure gauge to the pressure test port fitting on fuel rail.
  2. Remove fuel pump relay (located in power distribution center). Using a jumper wire, connect terminals No. 30 and 87. See Figure . Note fuel pressure gauge, and momentarily pinch fuel return line.
  3. Fuel pressure should be at least 53 psi (3.7 kg/cm2 ). DO NOT allow pressure to exceed 60 psi (4.2 kg/cm2 ). Release fuel return line.