Repair And Fix it

Ford F-150 fuel injectors are designed for long life. While regular cleaning will keep the fuel injectors performing well, fuel injectors have moving parts that wear out. Worn or broken fuel injectors result in inadequate or too much fuel being consumed during the combustion process. Incorrect fuel combustion may result in damage to the engine or catalytic converter. Fuel injectors which are worn or damaged should be replaced. To avoid future failures, if one fuel injector has gone bad due to wear and tear, replacement of all the injectors is recommended.

Instructions

Access the Fuel Injectors

1

Depressurize the fuel system. If your vehicle is equipped with a fuel safety cut-off switch--usually located on the passenger side front foot panel on the F-150--access and remove the electronic plug. This will disable the fuel pump. Turn on the engine several times to remove any fuel pressure in the lines. The engine will not stay started, this is normal.

2

Disconnect the battery cables to avoid fire hazards when working with fuel.

3

Remove any engine shroud, air intake tube, vacuum lines and other bolt-on accessories that restrict access to the fuel rails. Unbolt the fuel rail from the engine. The metal fuel rail will be braced to the engine with one or two bolts.

4

Remove the fuel injector electronics plug from each injector to be replaced.

5

Lift the fuel rails off the fuel injectors. Lift the end of the fuel rail closest to the bumper and pop each fuel injector free. Some injectors will stay in the engine and others will remain in the fuel rail. All injectors that are freed from either the engine or fuel rail will need new o-rings.

6

Remove the fuel injector from both the engine and the fuel rail. Inspect the injector for missing o-rings. Two o-rings should exist, one for the top connection on the fuel rail, and one for the bottom connection to the engine. Locate the missing o-rings and discard.

Replace the Injectors

7

Replace the o-rings with new o-rings. Lubricate the new o-rings with motor oil and slide over the ends of the fuel injectors. New injectors commonly come with o-rings installed. Lubricate the pre-installed o-rings with motor oil. A drop of oil on your finger smeared on the o-ring is sufficient.

8

Insert the new fuel injector into the engine hole. Press downward until the fuel injector is seated properly. A popping sensation may be felt, but not always. Pull upward on the injector. A properly seated injector will resist removal.

9

Replace all o-rings on the injectors from which the fuel rail was removed. Replace the fuel rail on each injector.

10

Bolt the fuel rail to the engine and replace any bolt-on accessories removed to access the fuel rail. Replace the fuel injector electronics plugs. Replace any vacuum lines removed. Replace the air intake tube. Replace the engine shroud, if equipped.

11

Reconnect the battery. Reconnect the fuel safety cut-off switch plug. Turn the ignition key to the electronics only mode for five seconds and turn off. Repeat the ignition key on/off sequence twice to allow the fuel pump to pressurize the fuel line. Inspect the fuel rails for leaks and repair. If necessary, return to step 1.

12

Start the vehicle to confirm installation.

The Ford F-Series is a family of full-size pickup trucks in continuous production since 1948. The F150 pickup has a rated carrying capacity of 3/4 ton, although modern versions of this truck can carry much more than that. The braking system on late-model F150s includes an anti-lock braking system, or ABS, as standard equipment. This feature allows a vehicle to stop during an emergency without locking the wheels. The brake controller on an F150 is also known as the hydraulic control unit, or HCU.

Instructions

1

Remove the negative cable from the battery with a socket wrench to ensure the engine doesnt start during the procedure. Disconnect the air cleaner assembly.

2

Disconnect the four fittings that connect the brake lines to the HCU with a socket wrench, and detach the brake lines from the HCU. Remove the three bolts that attach the HCU bracket to the vehicle frame, and disconnect the HCU bracket.

3

Remove the two nuts that attach the HCU to its bracket with a socket wrench, and disconnect the HCU from its bracket. Detach the ABS module from the HCU.

4

Attach the ABS module to the new HCU. Install the HCU to its bracket, and tighten its retaining nuts to 80 inch-pounds with a torque wrench. Connect the HCU bracket to the vehicle frame, and tighten the mounting bolts to 18 foot-pounds. Attach the brake lines to the HCU, and tighten the fittings to 13 foot-pounds.

5

Connect diagnostic tool Worldwide Diagnostic System 418-F224 to the vehicles data link connector. Bleed the ABS, and use the diagnostic tool to clear any ABS faults. A qualified mechanic typically performs this step.

Correct ignition timing specifications are crucial for engine performance. Timing affects many variables, including fuel economy and engine longevity. Sold for more than six decades, the F150 is a full-sized pickup manufactured by Ford Motor Company. Its engineers have determined precise timing specifications so that you can benefit from your 1989 F150 truck as much as possible.

Measuring Ignition Timing

A timing light is used to check the timing. When the motor is running, an inductive trigger signal is picked up from one of the spark plug cables, causing the light to illuminate and freeze while the spark plug fires. This helps determine the crankshaft position. Use this information for timing adjustment.

Timing Specifications

The ideal time at which the mixture should be fully burned on the 1989 F150 is in the range from 9.5 to 14.0 degrees before top dead center (BTDC) with engine running at 2,500 rpm.

Notes

These adjustments should be performed only on mechanical advance distributors. Also, when the engine is operating at high altitudes, the timing should be set to 14 degrees.

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.

Instructions

1

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.

2

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.

3

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

4

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.

5

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.

6

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.

The 1986 Ford F150 shipped from the factory with two four-wheel drive hub options; automatic locking hubs and manual locking hubs. With manual locking hubs, you need to get out of the vehicle and manually lock the front hubs before the truck will engage the four-wheel drive. With automatic locking hubs, all you need to do is engage the four-wheel drive with a lever and they will automatically lock within a few revolutions of the front wheels. While automatic locking hubs are a nice feature, some owners actually prefer the manual locking hubs because they are less prone to malfunctioning due to their simpler design.

Instructions

1

Stop the truck shift it into park, or first gear for trucks equipped with a manual transmission. Apply the parking brake.

2

Exit the truck and rotate the locking switch at the center of the wheel hubs to the lock position. If your truck doesnt have these switches, then you have automatic locking hubs and can skip this step.

3

Shift the transmission into neutral. Move the four wheel drive selector lever to the left, then down into your desired four wheel drive range. Use 4-LOW for low speeds below 15 miles per hour and increased torque. Use 4-HI for driving at road and highway speeds.

4

Shift the transmission back into drive, or first gear for trucks with a manual transmission. Release the parking brake, then drive forward 20 to 25 feet to engage the four-wheel drive hubs.