Throttle Body Fuel Injector (TBI) (Model 220): Installation

Install fuel filter on nozzle end of fuel injector. Ensure large end of filter faces injector so filter covers the raised rib at base of injector. Lubricate small "O" ring with clean engine oil, and push "O" ring on nozzle end of injector until it presses against injector filter.
Install steel back-up washer in top counterbore of throttle body injector cavity. Lubricate large "O" ring with clean engine oil. Install "O" ring directly over back-up washer. See Figure. Ensure "O" ring is seated properly in cavity and is flush with top of throttle body casting.
CAUTION: Ensure back-up washer and large "O" ring is installed before injector. Improper seating of "O" ring will cause fuel leak.
Install "O" ring on injector. Install injector into cavity by aligning raised lug on injector base with cast-in notch of throttle body cavity. Push down on injector until fully seated. Electrical terminals of injector will be about parallel with throttle shaft. Install throttle body cover.