2014 GMC Truck Misfire Diagnostics With Known Good Part

I diagnose a #1 cylinder misfire on a 2014 GMC truck with a 5.3L engine. I swap #1 and #3 spark plugs. Still has misfire on #1 cylinder. Checked #1 ignition coil for spark output. No spark. I swap #1 and #3 ignition coils. I have spark output on #1 cylinder but not #3 cylinder indicating that misfire moved with the coil and coil is faulty.
#GMC

Пікірлер: 33

  • @freddiebarrera7346
    @freddiebarrera7346

    I am having the same issue with my 2014 Silverado. This was very informative! Those old wires are such a pain to get off without damaging the aluminum heat shield!

  • @BChev4
    @BChev4

    I have a 14 Silverado with 41k miles. This seems like the problem I’m having.

  • @gerardoespinoza7202
    @gerardoespinoza7202

    Thanks for taking the time to make this video, I have a 2015 Silverado with 37,500 miles has the same problem. This video will help me to fix my truck, thanks so much🙏

  • @ronclaman156
    @ronclaman156

    Should have moved plug wire & coil also evap solenoid probably bad .. which allows it to draw fuel vapor from tank which is not metered by pcm

  • @lauracallahan8927
    @lauracallahan8927

    You mentioned not hearing the lifter, having this issue on an 07 Sierra with a cylinder 4 misfire. Changed plugs, wires, and coils already but the lifter is ticking. Any diagnostic tips?

  • @robertlatta950
    @robertlatta950

    I have replaced plugs wires still have misfires on number seven and replaced ignition coil on seven what could it be

  • @JamesFerragamo-fu7qm
    @JamesFerragamo-fu7qm

    You were absolutely perfect. Thank you for sharing. You did an amazing job with your explanations and video. I need to research this for a mis fire. I was wondering if it was a coil or an injector. Thanks again!

  • @juanl1900
    @juanl190021 күн бұрын

    I have a random misfire on my 2014 silverado , l have spark on all plugs , what else could it be ?????

  • @webbytwo
    @webbytwo

    What Autel model were you using?

  • @philh9238
    @philh9238 Жыл бұрын

    What about checking the spark directly out the coil. Could of been a bad spark plug wire

  • @robertgephardt618
    @robertgephardt61812 сағат бұрын

    I think you fixed my problem and I didn’t even start checking anything yet. Besides scan tool: misfire cylinder 6

  • @user-lb6om9sy8q
    @user-lb6om9sy8q

    information really helped thanks!

  • @allovruracing9404
    @allovruracing9404

    Very nice work! Thanks boss

  • @CA-nh3ek
    @CA-nh3ek

    Very helpful thank you

  • @edlozano8694
    @edlozano8694

    easy instructions. thanks

  • @yamaguy9846
    @yamaguy9846 Жыл бұрын

    In my case after swaping plugs, wires and coil, its still showing same plug, any idea what to check next?😅

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