LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chrysler >> 2003 >> 300M Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine System Testing & Engine Component Testing >> Fuel Systems >> Fuel System Pressure Release
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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 fill cap. Remove fuel pump relay from Power Distribution Center (PDC). See Fig 1 . PDC is located on left side of engine compartment, in front of coolant bottle. See Figure . Start and run engine until it stalls. Attempt to start engine. Continue restarting engine until it will no longer run. Turn ignition off.
  2. Reinstall fuel pump relay in PDC. One or more DTC may set when fuel pump relay is removed. Use scan tool and erase any DTCs that may have set after fuel pressure release procedure.
Fig 1: Identifying Power Distribution Center Components & Circuits
G00114624Courtesy of DAIMLERCHRYSLER CORPORATION