To service the fuel rail on a 3.3/3.8L engine, let out all fuel system pressure first. First, cut off and separate the negative battery cable at the battery and then take out the clean air hose from the
Throttle Body. Disconnect the quick connect fuel line from the fuel rail by using a fuel line release tool. Following that, remove the upper
Intake Manifold by labeling the
Fuel Injector electrical harness connectors for each cylinder. Onto the fuel injector electrical connectors and with the fuel rail bolts, remove them both. When you have the fuel rail off, move it away, tag it and mark each fuel injector so that if fits the right cylinder in the engine. In the end, pull the retaining clips from the fuel injectors at the fuel rail before removing the fuel injectors from their place.