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Home >> Jeep >> 2001 >> Cherokee Classic, 4WD, Part Time >> Repair and Diagnosis (Single Page) >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Removal, Overhaul & Installation >> Fuel Systems >> Fuel System Pressure Release
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Fuel System Pressure Release

WARNING: Fuel system is under high pressure. ALWAYS release fuel pressure before attempting to open system for testing or component replacement. DO NOT allow fuel to flow onto engine or electrical parts while testing fuel system components.
  1. Remove fuel cap from fuel tank. Ensure all pressure is released from fuel tank.
  2. Remove fuel pump relay from engine compartment Power Distribution Center (PDC). PDC is located in engine compartment, next to battery. Fuel pump relay may be identified by label on inside of PDC cover.
  3. Start engine and allow engine to idle until engine stalls. Attempt to restart engine until engine will no longer run. Turn ignition off.
    NOTE: One or more Diagnostic Trouble Codes (DTC) may set when fuel pump relay is removed.
  4. Disconnect any fuel injector connector. Connect a jumper wire between either fuel injector terminal and positive battery terminal. Connect another jumper wire to other fuel injector terminal. Momentarily touch other end of jumper wire to negative battery terminal.
    CAUTION: DO NOT supply power to fuel injector for more than 4 seconds, or fuel injector may be damaged.
  5. Place a shop towel under fuel line quick-connector at fuel rail. Use care when disconnecting fuel lines, as some fuel pressure may still exist in fuel lines. Disconnect fuel line quick-connector at fuel rail. Reinstall fuel pump relay in PDC. Reconnect fuel line quick-connector. Using scan tool, erase any DTCs that may have set after fuel pressure release procedure.
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