LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1990 >> Value Van 4.3 Z, Standard >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System (Gasoline) >> Throttle Body Injector >> Installation (Model 220)

Installation (Model 220)

  1. Install fuel filter on nozzle end of fuel injector. Large end of filter must face injector so that filter covers raised rib at base of injector. Lubricate small "O" ring with ATF and push "O" ring on nozzle end of injector until it presses against injector filter.
  2. Install steel back-up washer in top counterbore of throttle body injector cavity. Lubricate large "O" ring with ATF and install "O" ring directly over back-up washer. See Figure. Ensure that "O" ring is seated properly in cavity and is flush with top of throttle body casting.
    CAUTION: Back-up washer and large "O" ring must be installed before injector. Improper seating of "O" ring will cause fuel leak.
  3. 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 approximately parallel with throttle shaft. Install throttle body cover.
scientia non olet · About LEMON Manuals