1989 Ford F150 Fuel Injector Installation Instructions

The Ford F-Series is a line of full-size pickup trucks in continuous production since 1948. The F150 models have a nominal carrying capacity of at least 1/2 ton, although the actual payload is typically more than 1/2 ton. A 1989 Ford F150 has a variety of engine choices and all of them come with fuel injection. The procedure for installing a fuel injector in this vehicle will vary slightly depending on the size of the engine.

Tools Used: Socket wrench set, Pressure gauge T80L-9974-A, Engine oil

Fuel Injector Installation

Disconnect the cable on the negative terminal of the battery with a socket wrench. Loosen the cap on the fuel tank to relieve the pressure in the fuel tank. Remove the valve cap from the fuel pressure relief valve on the fuel line in the upper right quadrant of the engine compartment.

Attach pressure gauge T80L-9974-A to the relief valve and open the pressure gauge to relieve the pressure in the fuel system. Remove the pressure gauge from the relief valve and place the cap on the relief valve.

Disconnect the upper intake manifold with a socket wrench. Remove the fuel rail and detach the electrical connection for each fuel injector.

Remove the fuel injectors from the lower intake manifold by rocking the fuel injectors gently back and forth while pulling up. Replace any worn O-rings or plastic caps for the fuel injectors.

Apply engine oil to the O-rings and put them on the new fuel injectors. Place the plastic caps onto the top of the fuel injectors. Install the fuel injectors onto the lower intake manifold by pushing them in gently as you rock them back an forth.

Attach the electrical wiring to the fuel injection and install the fuel rail. Connect the upper intake manifold if you removed it in Step 3. Connect the cable to the negative battery terminal with a socket wrench.

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