Ford F150 3.5L V6 Ecoboost Misfires: Spark Plug Replacement

Ford F150 3.5L V6 Ecoboost Misfires: Spark Plug Replacement

This is a discussion on Ford F150 3.5L V6 Ecoboost Misfires: Spark Plug Replacement within the F150 Ecoboost Problems forums, part of the F150 Ecoboost Forum category; Ok so besides intercooler condensation causing misfires this is the #1 reason for misfires on this engine. Any misfires on this engine has great potential ...

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Thread: Ford F150 3.5L V6 Ecoboost Misfires: Spark Plug Replacement

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    Ecoboost Jr Member makuloco2000's Avatar

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    Ford F150 3.5L V6 Ecoboost Misfires: Spark Plug Replacement

    Ok so besides intercooler condensation causing misfires this is the #1 reason for misfires on this engine. Any misfires on this engine has great potential to damage the catalyst and should not be taken lightly. As many know by now boosted engines are hard on the plugs be it iridium platinum whatever and you may find the need for new plugs by 50k miles. More so now as many are coming in with carbon tracking as this one had. In this video I walk you through the procedure to change out plugs on these engines with the revised plugs, gap specs and TSB that have all come out recently. I hope this helps.

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    Ecoboost Sr Member FX4offroad's Avatar

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    Excellent video, thanks, it definitely helped this new Eco owner

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    Eco-Beast Vozaday's Avatar

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    Always appreciate your posts.
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    Ecoboost Master NickPic83's Avatar

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    Good, informative video. Thanks for sharing

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    Ecoboost Jr Member Texas10's Avatar

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    Thanks for the video.

    I bought the SP-534s and they were pre-gapped to about .031 and the old ones I pulled out had gaps ranging from .040-.044. I think my truck runs worse on the new ones gapped at .031, how is that possible? I didn't replace the boots like you show above. Any advice? Wondering if I should pull them and regap wider or smaller and replace the boots. It's pretty frustrating...

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    Ecoboost Veteran Yake Bait's Avatar

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    Great video. I found your video on changing plugs on 3.5L Edge which helped me a ton this weekend. I definitely will reference this new video when I change plugs again.

    I broke one of the red clips on my right rear plug. It fits securely but can those clips be replaced?
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    Ecoboost Pro btswein's Avatar

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    Quote Originally Posted by Yake Bait View Post
    Great video. I found your video on changing plugs on 3.5L Edge which helped me a ton this weekend. I definitely will reference this new video when I change plugs again.

    I broke one of the red clips on my right rear plug. It fits securely but can those clips be replaced?
    I broke one too but I would not worry about it. As long as the plug locks into the receiving end, it'll be fine. I believe you'd have to cut off the old plug and put on a new one.
    2011 XLT SuperCrew. 4WD. Max Tow w/ 3.73 E-Locker. 507A. Offroad Package. Halogen to HID Swap. Morimoto XB-LED fogs, Weathertech everything. AMP Research bed step.

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    Ecoboost Sr Member ExViTermini's Avatar

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    At one point did the engines start coming with correctly gapped plugs, or do they? Would I need to check them on my 14?

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    Ecoboost Veteran spence08's Avatar

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    Mine came with the right gaps but I'd still check them no matter what.
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    Ecoboost Sr Member parreda's Avatar

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    I just changed mine tonight along with the coil boots all the Motorcraft plugs came gapped at 0.028

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