reverse polarity???

Discussion in '94-04 V6 Mustang' started by cmalove08, Aug 16, 2009.

  1. cmalove08 New Member

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    we changed the spark plugs and wires on my stang last night everything was set up according to the ignition pack and now it wont start! i just found out that some models need half the banks on a diferent plug for reverse polarity is this true?
  2. bdcardinal tree hugger

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    no, they come that way from the factory on some cars, but the service part numbers are the same part number for both banks.
  3. MustangLX-5.0 Founding Member

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    What year V6? if this is 05-09 then your in the wrong forum. I never heard about polarity and ignition...thats why I think its a 4.0.

    can you be a little more specific? bdcardinal knows this cause he's a tech and has worked on 4.0's. I have never diagnosed CAN OBD's except maybe a few times.
  4. bdcardinal tree hugger

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    ford had different spark plugs on the banks on some of the waste spark cars. both the 3.8 and 4.0 are waste spark. Sean Hyland gave a good explanation in his book about 4.6's, but basically the other bank's plugs are designed differently to get the vehicle through the warranty/ emissions warranty period.

    the replacement service plugs are the same part number as the warranty thing isnt a concern anymore, that and it would confuse the hell out of people.

    EDIT: if none of that makes sense, its a combination of being sober and not having caffeine when i typed that.

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