Ignition Coil Question

Discussion in '2005 - 2014 S-197 Mustang -General/Talk-' started by 90lxwhite, Nov 18, 2013.


  1. 90lxwhite

    90lxwhite Mustang Master

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    Hey fellas whats going on? I have a couple 302 mustangs but the wife has an 09 expedition and the coils keep going bad. They've all been changed about a yr ago and now the new ones are starting to go out. Anyone know what causes premature coil failure?
  2. 90lxwhite

    90lxwhite Mustang Master

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    Not much action on these boards
  3. 90lxwhite

    90lxwhite Mustang Master

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  4. MidnightBlk98GT

    MidnightBlk98GT Member

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    When was the last time the plugs/wires were replaced? How are the connectors looking? Any arcing or "dark marks"on the connectiors? Is the computer throwing a code? Any diagnostics performed? Engine hesitation/misfiring? These are just some of the questions I can immediatly think of (I keep adding more the longer I leave this post open).

    Hope that this "sparks" others to comment on this board. (Sorry but I had to do it.)
  5. 90lxwhite

    90lxwhite Mustang Master

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    The codes that come up are always cop related. Cel light is on now but haven't ran the code this time yet to see which coil it is. I have a miss when accelerating on the hwy w light throttle and I have to take it out of OD to get it to smoothe out. It's a pretty violent shake. It does it whether cel is on or not. The front plugs are new but I need to change the rear still. But the last time I had to replace a new coil was one that was on a new plug
  6. jcgafford

    jcgafford Well-Known Member

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    i read on one of the explorer forums about those coils. something about the springs in the wiring arcing and frying stuff. it was a while ago so i don't recall most of it. sounds like a tune up is needed and codes cleared before delving any deeper here.
  7. jcgafford

    jcgafford Well-Known Member

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    yup it was the screw down type wiresets that have a spring resting ontop of the spark plugs. guess it has given enough people a problem to have some trouble shooting threads about it.
  8. 90lxwhite

    90lxwhite Mustang Master

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    I hate em. Also the factory plugs are a 2 piece and notorious for breaking when changing plugs. A-holes should've recalled em
  9. jcgafford

    jcgafford Well-Known Member

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    Yup. my wifes exploder has them and they were a pain to do a tune up with.
  10. MidnightBlk98GT

    MidnightBlk98GT Member

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    Just performed a little search and WOW, what at PITA!! Can't believe that Ford issued a TSB for 2-piece plug removal! I don't have any 3 valve engines in the stable but I'm just amazed at some of the problems that have been identified. I'm in total agreement with 90lxwhite; they should have recalled them.
    90lxwhite likes this.

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