OEM 2004 Chevrolet Impala Fuel Rail

2004 Chevrolet Impala Parts Questions & Experts Answers

• Q: How should the fuel rail assembly be serviced to prevent dirt and contaminants from entering the fuel passages on 2004 Chevrolet Impala?

  A: Before servicing the Fuel Rail assembly workers need to protect fuel passages from contamination through hole plugging and fitting capping procedures. Start by reducing fuel pressure levels from the system before cleaning all parts of the Fuel Rail assembly along with its connections. Remove the fuel feed pipes together with the fuel return pipes from the Fuel Rail while you remove the vacuum line from the Fuel Pressure Regulator then detach the wiring harness from the Fuel Rail. Evap purge solenoid removal comes first with position adjustment for Spark Plug Wires after their removal from the upper Intake Manifold and then disconnect Fuel Injector electrical connectors. You must remove the Fuel Rail nuts before extracting the Fuel Rail using matched force on each side. It is essential to position the Fuel Injector o-rings properly when installing the part so that the black o-ring faces up while the brown o-ring rests at the bottom. The Fuel Rail assembly must receive motor oil on all new o-rings before technicians place it on the Intake Manifold by hand while seating each Fuel Injector without tools. Put the Fuel Rail nuts in position and securely tighten them to 10 n.m (89 lb in) afterward connect the Fuel Injector electrical connectors together with the Spark Plug Wires and evap purge solenoid. The wiring harness should be reconnected to the Fuel Rail then the fuel feed and return pipes must be joined before installing the vacuum line to the Fuel Pressure Regulator. Complete fuel fill cap tightening then connect the negative Battery Cable followed by referencing the instructions for turning the ignition. After completing the first inspection for leaks inspect once more for fuel leakage then examine the final leak state. Near the end of the operation install the Fuel Injector sight shield.