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F-600 starting problem... help.

Discussion in 'Mechanic and Repair' started by PAPS, Feb 1, 2002.

  1. PAPS

    PAPS LawnSite Senior Member
    Posts: 404

    We have an 89' F-600 (370) gas dump. Replace starter and spark plugs a few days ago because the truck would turn over and not start. Finall it started right up after replacing those items. But the last few days it wont start again. It turns over and over but doesnt fire up. We shoot ether into the carb, and it doenst even turn over with that !!!! any help would be great
  2. Little Guy

    Little Guy LawnSite Member
    Posts: 118

    Check out the "Brain" it does regulated the spark I believe on the 600 it is located on the left side under the hood near the fire wall and it is about 5"x5" square if it original ford its black if after market maybe aluminum in color.

    Hope it helps

  3. Little Guy

    Little Guy LawnSite Member
    Posts: 118

    Meant to say it does regulate the spark!

  4. PAPS

    PAPS LawnSite Senior Member
    Posts: 404

    You did say that guy.... I think we figured out the problem, the truck wont start in the rain, or damp days, so we changed the spark plugs, wires, cap, rotor. etc. Other than damp or rainy days, the truck fires right up with no problems, hopwfully the repairs worked.
  5. big james

    big james Banned
    from texas
    Posts: 152

    He was right about them little 5by 5 boxes on a Ford ,they have caused many a problem!
  6. captdevo

    captdevo LawnSite Senior Member
    Posts: 932

    use silicone spray on your plugs, wires, connectors and cap.

    i do alot of 4-wheeling and it works for me!!!
  7. tindell

    tindell LawnSite Member
    Posts: 4

    :angel: Ihope thats your problem. If not check for creacked or broken wire from distrubutor to ign. (5x5 box) a few F600's had this problem and it can drive you insain. a clue to this is if the truck won't start on a damp wet morning. but once you get it going it will start like new the rest of day hot or cold.
  8. khouse

    khouse LawnSite Bronze Member
    Posts: 1,465

    The Ford modules did and do give some problems. 90% of them are when the heat in the engine compartment gets high and the electronics open up. Usually when your driving down the highway. It's like someone turns the key off while driving. A 1 hour cool down would let it start up to get some help or home. When cold it usally didn't give problems. The way you test it is to remove the coil wire stick a spark plug on it with a very small gap. Turn the key to the run position. Be carefull because when you turn the key on and off it will spark, this is normal. Then with the handle of a screwdriver or rubber mallot tap the controle module all over. If there is just one spark then your module is bad. This is a real test that is used by shops and Ford.
    While trying to start the engine have you checked for spark at that time.

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