2007-08 Honda Fit M/T & A/T Base Injector Upgrade Installation Manual

SECTION 1: PRE-INSTALLATION PRECAUTIONS:
Step 1: Remove the negative battery cable. Before removing the battery cable, verify that you have the “anti theft” radio code. It is usually located in your owner’s manual or on the side of the glove compartment. If you cannot find the radio code, take your car to your local Honda dealer so that they can retrieve the code through the Honda computer network.
SECTION 2: INJECTOR INSTALLATION
Step 2: Remove the plastic cosmetic cover from the intake manifold.
Step 3: Remove the five 12mm headed bolts/nuts that hold the plastic upper intake manifold to the aluminum lower manifold. Be careful when these two manifolds are not bolted together. Errant bolts/nuts or debris could fall into the intake manifold and cause severe engine damage. It is recommended that you cover the lower intake runners with protective tape or a shop towel.
Step 4: Remove the gas cap and remove any residual pressure from the fuel tank. Always use safety glasses while performing this operation.
Step 5: Remove the plastic safety cover from the fuel line/fuel rail connector. Push the safety clips from each side of the fuel line and gently remove the fuel line from the fuel rail. Have a shop towel ready for any high pressure residual fuel that might spray from the fuel rail.
Step 6: Unbolt the 10mm headed bolt that holds the fuel rail security tab to the cylinder head. It is located under the throttle body.
Step 7: Remove the fuel injector wiring harness plastic cover from the metal tabs on the fuel rail. Remove the fuel injector wiring clips from the injectors.
Step 8: Remove the two 10mm flanged nuts from the top of the fuel rail mounting studs.
Step 9: Lift the fuel rail from the engine compartment.
Step 10: Remove the injector retaining clips from the injector and the fuel rail one clip at a time. Remove and reinstall one injector at a time so that you don’t forget how they are installed.
Step 11: There are metal tabs on the fuel rail that the plastic housing was clipped into. These metal tabs will make reinstalling the fuel rail with the taller RC injectors difficult. If you prefer, you can cut the tabs off the rail with a pair of “tin snips.”If you want to leave the metal tabs in place, it will require you to insert the injectors into the cylinder head first before installing the fuel rail onto the injectors, and it will be more difficult. Listed below is a general guideline to fuel injector installation with the tabs removed.

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