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Thread: ignition coil

  1. #1
    Join Date
    Dec 2008
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    san antonio TX
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    ignition coil

    is there a way to check the coils with a ohm meter, if yes how can i do this. i think one of my coils is bad trucks been missing.
    1982 c10 lsx swaped, NP tuned, true duals, 4:11s, trutrac, e-fans, CAI

  2. #2
    Join Date
    May 2009
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    Plainfield, IL
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    yes. What truck? We have a chart at work, with the correct readings/places to check.
    blown transmissions are about as useful as 97% of the guys on this forum

  3. #3
    Join Date
    Mar 2009
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    White Settlement, Texas
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    there is a redneck type of way to do this......just make sure you wear gloves!!!! or your pants might end up wet

    ....i was told my a old man at ledford performance that if you pull the coil side of the suspected plug wire off and it throws a white spark then that coil is no bueno....hope somebody else chimes in on this so i dont sound like a complete idiot ...worked on my buddys firebird...after i got knocked to the ground
    Barks better than it bites......

  4. #4
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    Quote Originally Posted by oleshifty View Post
    yes. What truck? We have a chart at work, with the correct readings/places to check.
    its for my 99 silverado 5.3L. please let me know.
    1982 c10 lsx swaped, NP tuned, true duals, 4:11s, trutrac, e-fans, CAI

  5. #5
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    Jul 2008
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    Racoon Twp., PA
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    Quote Originally Posted by conekiller01 View Post
    there is a redneck type of way to do this......just make sure you wear gloves!!!! or your pants might end up wet

    ....i was told my a old man at ledford performance that if you pull the coil side of the suspected plug wire off and it throws a white spark then that coil is no bueno....hope somebody else chimes in on this so i dont sound like a complete idiot ...worked on my buddys firebird...after i got knocked to the ground
    I've been known to hold a plug or two in my hand to check spark. lol, ZAP! yep its good.
    2013 CC 5.3
    81 C10 LS1 project

  6. #6
    Join Date
    Sep 2007
    Location
    Hutto TX
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    467
    If it is throwing cylinder specific misfire code, swap the suspect coil with one of your other seven and see if misfire follows it.
    1991 Silverado ECLB
    LM7-T56

  7. #7
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    Dec 2008
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    Quote Originally Posted by r6z4o6 View Post
    If it is throwing cylinder specific misfire code, swap the suspect coil with one of your other seven and see if misfire follows it.
    its not throwing any codes.
    1982 c10 lsx swaped, NP tuned, true duals, 4:11s, trutrac, e-fans, CAI

  8. #8
    Join Date
    Aug 2008
    Location
    North Texas
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    Single cylinder misfire codes are very rare. 99.9999999999% of the time you only get P0300 no matter how bad one cylinder is missing.

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