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Home >> Dodge and Ram >> 2002 >> Durango Base, 5.9 Z, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Basic Diagnostic Procedures >> Fuel Systems >> Fuel System Pressure Release
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Fuel System Pressure Release

WARNING: ALWAYS release fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact engine or electrical components.
NOTE: One or more Diagnostic Trouble Codes (DTC) may set when fuel pump relay is removed.
  1. Remove fuel pump relay from Power Distribution Center (PDC). See Figure and Figure or Figure . Start and run engine until it stalls. Attempt to start engine. Continue restarting engine until it will no longer run. Turn the ignition off.
    2. CAUTION: DO NOT supply power to fuel injector for more than 4 seconds, or fuel injector may be damaged.
  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.
  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 at fuel rail. Reinstall fuel pump relay in PDC. Reconnect fuel line quick-connector. Using DRB-III(R), erase any DTCs that may have set after fuel pressure release procedure.
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