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Thread: 2014-2019 GM random misfire

  1. 01-06-2023, 08:27 AM #1
    KRT's Avatar
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    Default 2014-2019 GM random misfire

    Direct injection engine. Intake valves carbon up. This was my wife’s Tahoe with 60k miles. No driveability issues other than a slight stumble at idle, mostly on cold start up. Done this more for a maintenance item. Pulled intake and walnut blasted the valves.





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    More fuel = more boost!!
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  2. 01-06-2023, 08:35 AM #2
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    This is exactly where I am at with my 13 ecoboost with 125k. Stumbling at cold idle, good otherwise…
    Last edited by Drylok; 01-06-2023 at 08:38 AM.
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  3. 01-06-2023, 08:42 AM #3
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    You gonna get that dandelion seed out of there?


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  4. 01-06-2023, 08:42 AM #4
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    Quote Originally Posted by Glenn View Post
    You gonna get that dandelion seed out of there?
    That was my flower pic to the wife
    More fuel = more boost!!
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  5. 01-06-2023, 08:45 AM #5
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    Quote Originally Posted by Drylok View Post
    This is exactly where I am at with my 13 ecoboost with 125k. Stumbling at cold idle, good otherwise…
    Walnut blast the intake valves... we do a lot of them here on all kinds of vehicles (all direct injection)
    More fuel = more boost!!
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  6. 01-06-2023, 08:47 AM #6
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    Quote Originally Posted by KRT View Post
    That was my flower pic to the wife
    I hope she knows how lucky she is to have snagged such a hopeless romantic!



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