My 1993 Ford F150 Fuel Injectors Not Working! [Solved]

Loss of engine power or bad driving usually happens when the fuel injectors are not working. I’ve suffered from this and got a solution as well.

Well, the possible reasons why the 1993 Ford F150 fuel injectors not working are four according to my research. These are – 

  • Internal issue of ECU.
  • Clogged fuel injectors.
  • Incorrect torque values of injector parts.
  • ECM unit not pulsing.

In this guide, I’ll share the fixes for all the above causes and give an in-depth explanation so anyone can try them at home. Let’s Dive into It!

My 1993 Ford F150 Fuel Injectors Not Working

Fix The 1993 Ford F150 Fuel Injectors Not Working!

If you are having trouble with car performance due to fuel injectors, then start by inspecting for signs like a visible leak, noise, or lack of speed. To fix the issues, try the given techniques:

Solution #1: Reset The ECU

  • Open the hood of your car.
  • Locate the battery compartment.
  • Remove the cover (if it has).
  • Take out the negative terminal using a wrench. Be sure to grab a rag and place the negative terminal above the rag so it doesn’t contact other parts accidentally.
  • Then, remove the positive terminal using the same tool. Place it on the rag but not contacting the negative terminal.
  • Let the battery be like this for 10 minutes.
  • Next, reinstall both terminals (starting from the negative terminal).
  • Idle your car for a while so that the ECU system can recalibrate and reset itself during the period.

Solution #2: Clean the Clogged Fuel Injectors

  • Be sure your car is turned off for 1 to 2 hours. 
  • Open the front trunk and secure the hood. 
  • Take a T wrench and detach the screw that holds the engine cover.
  • Remove the engine cover.
  • Locate the fuel injectors and inspect them.
  • Open the fuse compartment cover and detach the fuel pump fuse. Be sure to check your owner’s manual to find the fuse.
  • Locate the intake manifold. Take out the clips that hold injection lines underneath.
  • Then, place a paper towel to cover the opening in the cylinder head.
  • Take out the clips at the brackets on injection lines.
  • Loosen these out at the injectors and be sure not to remove the lines.
  • Drain the line for 1/2 gallon of coolant and then detach the water crossover tube.
  • Unplug the oil fill tube from the timing cover.
  • Twist the engine to the right side after detaching the center bolt of the crankshaft with a 15/16” socket ratchet.
  • Again, detach the bolt at the opening area. Keep on doing this until all the 3 bolts are removed.
  • Look at the top section of the timing cover (behind the round top) and find the spot where the injection pump is bolted to the cover (rear side). 
  • Clean the top cover and find the thin line between the cover and the injection pump. Know that the position of the 2 lines is assembled together.
  • Detach the throttle cable assembly from the injection pump and be sure to detach the wires. During this, locate the big pink wire and where it goes.
  • Take out the return hose at the injection pump.
  • Grab a 15 mm socket wrench to detach 3 bolts that hold the injection pump to the timing cover.
  • Carefully remove the injection line.
  • Grab a big plastic hose and insert it into the fuel injector run-on line. Try to use a clamp so that the line doesn’t leak.
  • Use a strong fuel injector cleaner like the Gumout 510013 and fill it on the big plastic hose which is assembled together with the fuel injector run-on line.
  • Wait for a while. Until you see all the injectors are not showing block during the pressure you out using a spray (if possible, try to use).
  • Reinstall all the parts by doing the opposite of the above directions.
  • Run your car for some while to heat up the engine and drive to see if the problem is solved or not. And that’s basically how to clean F150 fuel injectors.

Solution #3: Correct the Torque Values of Injector Parts

Remove the intake manifold, visible bolts, and other fuel injector parts (the direction is given in Solution #2). After that, reinstall all the parts but use the correct torque values for each part of the fuel injectors. Follow these:

  • Intake Manifold: 25 – 37 ft-lbs.
  • Gear Bolts: 13 – 20 ft-lbs.
  • Injection Pump Mounting Nuts: 25 – 37 ft-lbs.
  • Injection Lines: 15 – 24 ft-lbs. 
  • Injection Pump Fuel Inlet Fitting: 15 – 20 ft-lbs.

Solution #4: Replace the ECM Unit

  • Open the front hood and locate the fuel injector.
  • Find the ECM (Engine Control Module) side of the injector.
  • With the voltmeter, inspect underneath whether the ground from the ECM is pulsing the injector or not.
  • Remove all the plugs that are inserted into the ECU driver by using a pair of pliers.
  • Take out the ECU driver part after wearing the safety gloves.
  • Insert the new ECU driver part and attach the plugs.
  • Reprogram 2 keys and reset the PATS theft system. It’s best if an expert does it to handle the dealer reprogramming task. This will solve the no injector pulse Ford F150 of the ECU issue.

Wrap Up

So, when you find your 1993 Ford F150 fuel injectors not working, try the above techniques. And if it does not solve the problem, maybe get help from a professional person. 

The solutions won’t take long unless it’s your first trial with the mechanical stuff. Hope you find this guide easy to understand in order to solve the bug of fuel injectors. 

Have A Nice Day Ahead!