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  1. #1

    Spark Plug 2006 GTX Limited

    Hi. I am going to replace the plugs on my 2006 GTX Limited. I know the plug number is NGK DCPR8ES. There are several different stock numbers for this plug. Do I need the Stock #4339 which has the removable Terminal top, or the model which does NOT have the removable top ?

    I haven't tried removing the Coils yet to look at the top of the plug to see if it's the threaded terminal or not.

    And what's the best "test" to check the coils to see if they are good or not ?

    Thanks for the help !
    Last edited by pratzert; 07-16-2013 at 08:29 PM.


  2. #2

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    You need the removable top plugs- 4339.

    Use an Ohm meter to test coil resistance per the shop manual

    Though as the manual states, a coil can still be bad even if resistance is good. With engine running pull each coil pigtail- engine should run worse as it's only firing 2 cyl. If no change in engine- that coil is bad.

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  3. #3
    Viking24,

    Thanks a lot for the info.

    I appreciate it....

    I didn't realize there were different version of the plug until AFTER I ordered 6 of them which are not the removable top model.

    $20. Not sure if I should try to return them (and pay postage) or just trash 'em.

    Anyway... my bad.....

    Regards.

  4. #4

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    You can always try to barter them at a local auto parts (probably cant at a chain like Azone, or Pep Boys) store for something.

  5. #5
    That's a good suggestion.

    I guess even if I give them away it's better than trashing them.

    I just found 9 of them at a local Advance Auto store. I paid for them on-line and will pick them up on the way home today.

    After discount they were $3.35 each (plus Tax). Not too bad. And I made sure they were the 4339's.

    Thanks !

  6. #6

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    Napa has em for $2.69 /ea next time you need them.

  7. #7
    Quote Originally Posted by Viking24 View Post
    Napa has em for $2.69 /ea next time you need them.
    DANG ! That's a really good price.

    Thanks for the heads up.

  8. #8
    Quote Originally Posted by Viking24 View Post
    You need the removable top plugs- 4339.

    Use an Ohm meter to test coil resistance per the shop manual

    Though as the manual states, a coil can still be bad even if resistance is good. With engine running pull each coil pigtail- engine should run worse as it's only firing 2 cyl. If no change in engine- that coil is bad.

    Click image for larger version. 

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Views:	49 
Size:	70.1 KB 
ID:	306442
    Click image for larger version. 

Name:	plug 2.jpg 
Views:	60 
Size:	72.2 KB 
ID:	306443
    Where can I D/L those pages from the manual ?

  9. #9
    I recently found the 4339s at Oreilly's here in Vegas for $2.39 each...bought 15 and will get more soon...before they decide to raise the price

  10. #10
    Quote Originally Posted by blkturbo! View Post
    I recently found the 4339s at Oreilly's here in Vegas for $2.39 each...bought 15 and will get more soon...before they decide to raise the price
    That's a super price. Wish we had an O'Reilly's here. But I have 9 from Advance Auto that oughta last me a few seasons.

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