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Home >> Jeep >> 1987 >> Comanche Base, 2.1 B >> Repair and Diagnosis >> Engine Performance >> System >> 2.5L TBI System >> Adjustments >> Fuel Pressure Regulator
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Fuel Pressure Regulator

  1. Remove air cleaner assembly. Connect a tachometer to terminals 1 and 3 of small diagnostic connector D1. Remove screw plug and install special Fuel Pressure Test Fitting (8983 501 572 ).
  2. Connect accurate fuel pressure gauge to fuel pressure test fitting. Start engine and accelerate to 2000 RPM. Turn torx head adjustment screw on bottom of fuel regulator to obtain 17.3 psi (1.2 kg/cm(C)) of fuel pressure.
    NOTE: Turning screw inward increases pressure; turning screw outward decreases it.
  3. After specification is reached, install a lead seal ball to cover regulator adjustment screw. Turn ignition switch off, and disconnect tachometer. Disconnect fuel pressure gauge, remove test fitting, and install original plug screw. Install air cleaner assembly.
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