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Thread: Cylinder 7 eating a spark plug

  1. #1
    Rockey's Avatar
    Rockey is offline Cadillac Owners Fanatic
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    Cylinder 7 eating a spark plug

    Is cylinder 7 notorious for running lean on the LS motors? Is there any fix or solution for this. My tuner suggested going with a larger injector for cylinders 7&8. Has anyone ever done this?

    Can the injector pulse width be changed on each cylinder individually?

    Last edited by Rockey; 05-18-12 at 01:07 PM.

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  3. #2
    baabootoo's Avatar
    baabootoo is offline Cadillac Owners Connoisseur
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    Re: Cylinder 7 eating a spark plug

    Did you have the injectors flow matched ever? This doesn't make any sense to me; albeit with my limited knowledge of injectors from the past.

  4. #3
    Haze is offline Cadillac Owners Member
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    Re: Cylinder 7 eating a spark plug

    I'd take it in to the dealer. That sounds like a faulty injector to me.

  5. #4
    M5eater's Avatar
    M5eater is offline Cadillac Owners Connoisseur
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    Re: Cylinder 7 eating a spark plug

    Quote Originally Posted by Rockey View Post
    Is cylinder 7 notorious for running lean on the LS motors? Is there any fix or solution for this. My tuner suggested going with a larger injector for cylinders 7&8. Has anyone ever done this?

    Can the injector pulse width be changed on each cylinder individually?
    different sized injectors?

    Sounds like your need a new tuner, and someone to look at your engine. I've never, ever heard of anyone using different sized injectors.

  6. #5
    tbauer's Avatar
    tbauer is offline Cadillac Owners Member
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    Re: Cylinder 7 eating a spark plug

    Have to agree w/ M5eater.

    I did a lot of searching and reading before my build and I also haven't heard of anyone using different sized injectors in these motors. I know my f250 diesel had a dead head (non regulated return fuel line) which cause #8 to lean out and the fix/mod was a different single shot injector (the original was a split shot) but this is two totally different engine technologies.


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