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Home >> Jeep >> 2002 >> Wrangler X, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Engine Component Tests >> 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.
NOTE: For component location, see COMPONENT LOCATIONS  . After each repair procedure has been completed, reconnect all components.
  1. Remove fuel fill cap. Remove fuel pump relay from Power Distribution Center (PDC). Start and run engine until it stalls. Attempt to start engine. Continue restarting engine until it will no longer run. Turn ignition off.
  2. 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.
  3. 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. Reinstall fuel pump relay in PDC.
    NOTE: One or more DTC may set when fuel pump relay is removed.
  4. Erase any DTCs that may have set after fuel pressure release procedure.
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