OEM 2008 Chevrolet Colorado Fuel Rail

2008 Chevrolet Colorado Fuel Rail Parts Questions & Experts Answers

• Q: How to replace the Fuel Injection Fuel Rail Assembly on 2008 Chevrolet Colorado?

  A: Releasing fuel system pressure is the first step for replacement of the fuel injection Fuel Rail assembly requiring the use of fuel pressure relief (With CH 48027) or (Without CH 48027). The first step must detach the evap purge tube from the throttle body control module as well as from the evap canister purge solenoid valve . The second step involves disconnecting the fuel feed line quick connect fitting from the Fuel Rail. Meanwhile detach the engine wiring harness connector from the Fuel Injector harness connector after removing the Intake Manifold. Clean the Fuel Rail assembly and the Cylinder Head with gm x-30a engine cleaning spray along with equivalent products that do not allow the Fuel Rail to reach a soaking condition. Extract the Fuel Rail assembly by removing its bolts while maintaining safe control of the injector electrical connector terminals and spray tips through fitting capping and plugging method to stop contamination. Get rid of the lower o-ring seals from each Fuel Injector through discarding them. Installation should continue if Fuel Rail replacement is not needed. The disassembly process starts with removing Fuel Injector harness clips from the Fuel Rail before proceeding to remove the harness , fuel injector retainers and fuel injectors followed by upper o-ring seals . To complete the installation process apply a small amount of mineral oil gm p/n 9981704 to the new upper o-ring seals and then put those seals onto the fuel injectors before you install the injectors and retainers with proper position of the harness secured using retaining clips. The new lower o-ring seals require the application of gm p/n 9981704 mineral oil for installation before they can be placed onto each injector tip. The Fuel Rail needs to be positioned toward the Cylinder Head for properly seating the injectors while their spray tips extend inside. Secure the Fuel Rail bolts at 10 n.m (89 lb in) before attaching the engine wiring harness connector to the Fuel Injector harness connector . The procedure includes replacing the Intake Manifold followed by connecting the evap purge tube both to the throttle body control module and evap canister purge solenoid valve and attaching the fuel feed line quick connect fitting to the Fuel Rail. Check for fuel leaks by first turning on the ignition with the engine off for 2 seconds followed by an ignition turn off for 10 seconds. After the ignition turn on with the engine off you should examine for any fuel-related issue.