Fly Wheel Or Starter?

Discussion in 'Technical' started by Acedmav75, May 10, 2008.

  1. Acedmav75

    Acedmav75 Member

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    alright my 75 mav will start up fine when its cold but if i drive it some where turn it off then come back to it and try to start it its a pain. my mechanic says its the flywheel is that true? i put new spark plugs in too could it be that i didnt gap them right? would that help that much?
     
  2. PINKY

    PINKY .....John Ford.....

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    what does it do when you try to start it and its a pain?
     
  3. rthomas771

    rthomas771 Member

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    One of the signs of a starter going bad is when it sounds like a very weak battery. If the starter is spinning fine...could be a carburetor or ignition problem. Describe what the sound of "pain" sounds like and then we know where to go from there.
     
  4. ratio411

    ratio411 Member

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    Sounds like you might be refering to regular starting when the starter is cool, and the starter dragging when it is hot.
    There are a few causes if this is the problem.
    It could be one, or more, of the following:

    *Timing. Too much advance will cause the starter to drag more and more as the engine temp increases.

    *Bad grounds. The engine should have ground cables from the battery to frame and engine. They might be in different places. You may have a cable from battery to one or the other, then a cable from the engine to frame in another location. There are often also ground cables and ground straps in various places depending year/make/model car. Most any Ford will have a strap from the back of the intake, or bellhousing area, to the firewall. Any of these ground cables or straps must have a good connection and the cables must be in good shape, or the electrical system will malfunction. Often the starter is first to suffer from bad or damaged connections/cables/straps. This can potentially damage electrical parts like the starter, over time.

    *Battery cables/connections in general. Like the grounds, all the cables and connections much be clean, tight, and good shape. The hotter the car gets, the more resistance in the electrical wires/cables. Also a hot starter will draw more amps.
    More amps and more resistance is a double whammy that must have good cables/clean connections. Make sure your cables are not damaged, broken internally, and all connections are clean.

    *Starter in process of dying. Like I mentioned, heat makes the starter draw more amps. If it is dying, that will add even more. It comes to a point where it is a viscious circle. Starter drags, gets hotter, draws more amps, dies a little more, then draws more amps, get hotter, draws more amps, dies a little more...
    The starter may be dying naturally, or it may be dying due to one of the above mentioned stresses of timing, bad grounds, and/or bad cables/connections.

    I can't imagine how it would start fine cold, then not start hot, and the problem being the flywheel.:huh:
    The only time a flywheel can keep a car from starting is if the teeth are damaged.
    Damaged teeth are damaged teeth, no matter if the car is hot or cold.

    Same with the bendix. It will engauge/not engauge the same percentage of times, no matter temp.

    Edit:
    Oh yeah, forgot...
    It could be the battery or alternator too.
    If the alternator isn't putting out the charge it should, the battery could be weaker than it should be.
    When the car is cold, it takes 'X' amount of amps to spin the starter. The battery might be good enough, or the alternator might be charging just enough to put out that amount of amps.

    When the starter is hot, the amount of amps the battery must put out is much higher than 'X' amps. If the battery is not charged enough by a weak alternator, or if the battery is on it's last leg, it might not have enough amps to spin the starter when hot, compared to the lower amps to spin cold.
     
    Last edited: May 10, 2008
  5. PINKY

    PINKY .....John Ford.....

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    thats what I am trying to get at :)
     
  6. Acedmav75

    Acedmav75 Member

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    well ok yae thats why it didnt make sense that my mechanic say it was the flywheel anyways. When i come back to it and its hot it just wont start just turning the key and the sound of the starter goes but its like no fuel gets to the carb to start it.(when its hot)
     
  7. Acedmav75

    Acedmav75 Member

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    well i got a new battery and its juiced up so it cant be the battery problem as for the grounds i would have to check i was thinking it could just be the starter dying im pretty sure its the original starter so if anything i should replace it anyways just the flywheel thing doesnt make sense to me. so its gotta be the starter as as ratio411 said.
     
  8. ratio411

    ratio411 Member

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    What do you mean by this?
    Is the starter spinning at the same speed and strength hot as when cold??
    Is the starter dragging when hot, and not spinning the engine fast enough to start?

    Please give very clear and concise descriptions of the problem you are having. That way you don't have to throw money at it! Sounds like you already may have bought a battery you didn't need.
     
    Last edited: May 10, 2008
  9. Dean Deeter

    Dean Deeter Member

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    I am not the smartest apple in the box but it beats the heck out of me it be a flywheel. Does the flywheel heat up or something:rofl2::rofl2:
    I would think the first thing I would check is timing. And connections. I agree with ratio we need some more info on excatley what is doing when it is hot and not starting.
     
    Last edited: May 10, 2008
  10. Acedmav75

    Acedmav75 Member

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    yea its dragging when its hot like its not spinning fast enough to turn it on. sorry for all the undetailed things so its probably the starter right? and if so any good place i should get one or brand etc?
     
  11. Dean Deeter

    Dean Deeter Member

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    I would take it to a advance auto or auto zone and they will check the starter for you before replacing things that are not needed. I was joking when I said was it heating up about the flywheel. What is spinning the starter and not turning the flywheel over? Or the engine is turning over but just not starting?
     
  12. rayzorsharp

    rayzorsharp I "AM" a Maverick!

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    I hate to say it but it sounds like your mechanic may need a mechanic. After reading all the posts...sounds like a starter to me too.
     
  13. timsrick

    timsrick Member

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    whats your timing like?if its over advanced it could be hard to start when hot.my truck is like that.i've tried many different starters.is this someting new or has it just started?
     
  14. rayzorsharp

    rayzorsharp I "AM" a Maverick!

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    Very true...just like ratio said. :)
     
  15. PaulS

    PaulS Member extrordiare

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    If the starter is engaging but it just kind of "BUZZ"s a new starter will probably fix it. The cause could be that the starter pole is not pulling in far enough to open the pull-in circuit in the starter. The contacts do go out of adjustment sometimes. If you adjust the contacts it usually runs fine. If you have never rebuilt a starter this may not be something you want to try - I have done it in a three-piece suit, on the side of the road once. It's not hard but you have to know what you are doing. It might also be bad brushes or a burnt field coil - you don't know until you open it up.
     

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