Spark Plug Wire Arching To Header

Discussion in 'Fox 5.0 Mustang Tech' started by sen2two, Aug 6, 2013.


  1. sen2two

    sen2two Active Member

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    i just noticed that the rear most spark plug boot on the passenger side is arching out to my header. the headers are bbk shortys. is there a home way remedy this or do i need to buy those protective covers?

    could this cause my car to break up past 5k rpm? because mine is and i cant seem to figure out why. hopefully this is it...
  2. MFE92

    MFE92 Active Member

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    Yes, that's exactly why it's breaking up. A boot may help a little bit, but you're better off getting creative with plug wire looms and zip ties to hold it out of the way. BTW you'll have to replace that wire now.
    stangboy likes this.
  3. f8tlfiveo

    f8tlfiveo My wife likes my spool and blow-off valve.

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    Boot will stop it.. I had the same problem. Bought a set of high temp boots on eBay.
  4. sen2two

    sen2two Active Member

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    i tried wrapping the boot in a piece of leather that i cut off a welding bib. did not work. i still see the charge going from header to the boot. guess ill order some of those covers. which ones did you get?
  5. Gearbanger 101

    Gearbanger 101 we love us some gays up here Super Mod

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    It's arcing because it has burned through already. No amount of wrapping at this point is going to help. Replace the wire, then wrap it.
    stangboy and f8tlfiveo like this.
  6. stangboy

    stangboy Founding Member

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    Yeah, what he said. Took the words right out of my mouth.
  7. f8tlfiveo

    f8tlfiveo My wife likes my spool and blow-off valve.

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  8. sen2two

    sen2two Active Member

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    just ordered an indentical set. i am going to order spark plug wires today. but im wondering if i shoukd order them with 45* or 90* boots? which would clear better?
  9. Gearbanger 101

    Gearbanger 101 we love us some gays up here Super Mod

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    What heads are you running? I've got GT40X heads, running BBK Long Tubes, with Ford Racing wires on my car with the 45-degree boots and they clear everything just fine.
  10. f8tlfiveo

    f8tlfiveo My wife likes my spool and blow-off valve.

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    I ran those boots laying right on the headers with no problem. Just make sure you push them over the boot all the way down to the head
  11. sen2two

    sen2two Active Member

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    stock heads. i already ordered the ford racing 9mm wires too. they only come in 45* so im sure it will be fine. especially with the covers.

    thanks guys. hopefully this will fix the breakup and let me push it past 5k in 1st and 2nd.
  12. Noobz347

    Noobz347 Stangnet Facilities Maint Tech... Er... Janitor Admin Dude

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    Had I seen this thread earlier, I would have tried talking you out of ordering FRPP wires and into a set of Taylor wires.

    Hope it works out for you though. :nice:
  13. chaos254

    chaos254 Founding Member

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    Taylors fit so much better than the frpp. Im glad I switched when I did my tuneup

    Sent from my SCH-I545 using Tapatalk 2
  14. mikestang63

    mikestang63 Mustang Master

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    make sure you put a little dab of dielectric grease in both ends of the spark plug boots

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