OEM Cadillac Catera Fuel Rail

Cadillac Catera Fuel Rail Parts and Q&A

• Fuel Rail
  90411881
  Q: How to replace the fuel injectors and fuel rail on Cadillac Catera?

  A:

  The first step to replace Fuel Injectors and Fuel Rail requires lowering fuel system pressure. Use duct tape to seal the intake ducts following upper plenum removal because any foreign object entry will lead to damaging engine components. Begin by removing the intake plenum and then separate the Fuel Rail intermediate lines from their supply-return connections before relocating them aside from the Fuel Rail. Begin by unbolt the Fuel Rail bracket around the fuel supply-return lines then detach the Fuel Injector electrical connectors followed by unfastening the Fuel Rail harness before setting it aside. First remove the atmospheric vent hose of the fuel pressure regulator then detach the Fuel Rail attaching bolts from the Intake Manifold. After removing the Fuel Rail assembly use compressed air to remove dirt from the intake casting entry area of the injectors. Before removing the Fuel Rail you should first take off the retainer elements from the fuel injectors to extract the injectors from the rail. Emery cloth cleaning of fuel pipes requires radial motion to protect the o-ring surface while male tube ends receive fresh towel wipes and the system undergoes connection inspection. Follow the guidelines for component change and discard all used o-rings from the injectors. When installing the new injector o-rings apply engine oil to them and position them onto the injectors. Use new retainer clips to connect the injectors to the Fuel Rail where their electrical connectors face directly toward the crankshaft centerline. Fasten the Fuel Rail with injectors into the Intake Manifold by tightening the Fuel Rail attaching bolts to 8 n.m (71 lb in). Continue the atmospheric vent hose of the fuel pressure regulator before reattaching Fuel Injector electrical connectors to the Fuel Rail and securing the Fuel Rail bracket bolts near the fuel supply-return lines with a torque of 8 n.m (71 lb in). You should reattach the Fuel Rail supply line and return line at 15 n.m (11 lb ft) torque while reinstalling the intake plenum followed by negative Battery Cable connection. Use a few engine cranks to check if the engine starts after which you need to verify for any fuel leaks.