OEM 2002 Cadillac DeVille Fuel Rail

2002 Cadillac DeVille Fuel Rail Parts Questions & Experts Answers

• Q: How to replace the fuel rail assembly on 2002 Cadillac DeVille?

  A: Relieving pressure from the fuel system stands as the first step before replacement of the Fuel Rail assembly. Spray the Fuel Rail assembly with gm x-30a or equivalent engine cleaning solution without submerging it in liquid cleaners. The replacement process requires disconnecting three items: the fuel feed and return pipes (2, 3) together with the Fuel Pressure Regulator vacuum hose and also the positive crankcase ventilation (PCV) air tube and PCV Valve from the cam cover. Start by removing the Fuel Rail bracket retainer nut then separate and place the Fuel Injector electrical connectors to the side. First disconnect the engine wiring harness from the Fuel Rail studs then proceed with removing the Fuel Rail attaching studs along with the Fuel Rail. Each injector requires removal of its lower o-ring seals which should be discarded from the spray tip end. To replace the Fuel Rail you should disconnect all the fuel injectors as well as the Fuel Pressure Regulator. Before fitting the assembly components install first the Fuel Pressure Regulator followed by the fuel injectors after applying oil to the new lower injector o-ring seals. Apply new o-ring seals to the injector spray tip ends before you install the Fuel Rail along with its attaching studs which need to be tightened to 10 n.m (89 lb in). You should install the Fuel Rail bracket retainer nut which requires 10 n.m of torque (89 lb in) after connecting the Fuel Injector electrical connectors to their respective fuel injectors. Replace the PCV Valve into position on the cam cover and the coolant surge tank inlet pipe while it also connects to the pcv air tube. The system requires installation of the Fuel Rail vacuum hose connecting to the Fuel Pressure Regulator and the attachment of fuel feed and return pipes (2, 3) to this component before reconnecting the negative Battery Cable. The last step consists of leak inspection through a procedure that involves turning the ignition on with the engine off for two seconds followed by ten seconds of ignition off time before another two seconds of ignition on with engine off to confirm leak-free conditions before installing the Fuel Injector sight shield.