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...
    #1
  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.
    #2
    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.
    #3
  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?
    #4
  5. Gearbanger 101

    Gearbanger 101 Straight Outta Locash 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.
    #5
    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.
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  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?
    #8
  9. Gearbanger 101

    Gearbanger 101 Straight Outta Locash 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.
    #9
  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
    #10
  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.
    #11
  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:
    #12
  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
    #13
  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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