Truck Won’t Start Update Ford 89 F250, Engine 351 5.8L

Posted in Ignition Systems

First off, I thank you all very much for advice, ive printed it and have it readily on file, and have read it carefully, but I am still far from solving my problem.

Since my first post, we have not been able to start the truck.. yesterday we couldn’t get any spark and were stuck with that problem the whole day, however we eventually exchanged “TFI” modules with a different truck, allowing us get spark, but perhaps a weak spark – because we can’t get the engine to fire.

now our suspicions lie with either a problem in the fuel injection system or weak engine compression – or perhaps even in weak spark, perhaps indicating a faulty ignition coil, or related parts.

One thing i did not mention in my last post is that this engine is new… however the EEC system is old and parts of it may be broken or disconnected.. the EEC system actually has us quite in the dark, as I have yet to know what much of it does..
This engine is only about a year old, and had run very well until mid summer when it seemed too gradually lose power/begin to run bad.. the truck is needed to pull cattle and do heavy work, granted, but it should still be in excellent condition.

About mid November the transfer case went bad and the truck sat in the farm garage about a month until we put in a spare – and then it started up and ran, but the engine ran so poorly we decided to look at the timing… leaving us with our current dilemma.

There are 5 Answers for "Truck Won’t Start Update Ford 89 F250, Engine 351 5.8L"

    1. Bert from Brandon says:

      Now that you have spark, you may still have a flooded engine from trying to start it with no spark.

      Give it a day to clear out and then try it.

      Are you sure the distributor timing is right?
      Has it run since you put the engine in?

      Change the coil wire and distributor rotor.
      I have seen several of these fail.

    2. bobweb says: ^( ^( ^( ^(

    3. imbustass says:

      As I stated in my first answer, replace the ignition coil and check the coil connections
      good luck

    4. Shane T says:

      Make sure you’re ignition timing is correct. Are the plugs gapped properly, and the proper heat range? The motor could be flooded out. Turn the motor over for a minute with you’re throttle wide open.

      You need about 40psi at the fuel rail on the Fuel injection systems of that era. If you have that, then I would also make sure you are getting 12 volts to each injector

      I would also check all your grounds. As dumb as it may sound, when dealing with lights/electronics, I have been able to fix about half my problems by grounding it better or regrounding it.

      Also I would test you ICM, those distibutor mounted modles seem to be problem-matic.

      Just be happy you’re working on a ford and not one of those imports.