LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 1999 >> Wrangler SE, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System >> Fuel Pressure Release
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Pressure Release

  1. Remove fuel fill cap. Fuel filler tube contains a spring-loaded door, located below fuel fill cap, which is used to seal fuel tank if fuel cap is not properly tightened. Using a non-metallic object, depress flap to relieve tank pressure.
  2. Remove fuel pump relay from Power Distribution Center (PDC). For relay location, refer to label on PDC cover. Start engine and run until it stalls. Attempt to restart engine until it will no longer start. Turn ignition off.
    3. CAUTION: DO NOT use the following steps to relieve fuel pressure from fuel lines as excessive fuel will be forced into cylinder. Perform the following steps after completing steps 1)  and 2)  .
  3. Disconnect wire connector from any injector. Using a jumper wire with alligator clips, attach one end to either injector terminal. Attach other end of jumper to positive battery terminal.
    4. CAUTION: Powering an injector for more than a few seconds will permanently damage injector.
  4. Connect one end of another jumper wire to other injector terminal. Momentarily touch other end of jumper wire to negative battery terminal for no more than a few seconds.
  5. Place a shop rag below quick-connect fitting at fuel rail. Disconnect quick-connect fitting at fuel rail. Reinstall fuel pump relay. Using scan tool, erase any DTCs caused by removing fuel pump relay.
scientia non olet · About LEMON Manuals