CEL still running lean
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  • 2 Post By dkozloski
Cadillac STS Forum - 2005 through 2012 Discussion, CEL still running lean in Past Cadillac Vehicle Discussion; Please help me i have a 2006 Cadillac STS V8 and im trying to figure out why its running lean ...
  1. #1
    Jneedom14 is offline Cadillac Owners Member
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    CEL still running lean

    Please help me i have a 2006 Cadillac STS V8 and im trying to figure out why its running lean its good when i get into the throttle but at idle it is a little shaky not misfiring just stumbling a little. And what all can happen from running lean i dont want to damage the engine.

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  3. #2
    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
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    Re: CEL still running lean

    Check the intake manifold bolts. It's a very common problem.
    Don't mess with Binky Bear!


  4. #3
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: CEL still running lean

    Deja Vu

    Hey -14. Why not just post that your bolts are tight, even if you never checked them? I'm tired of this nonsense!

    Lean engines will run hot and in extreme cases burn valves & pistons.

    It's quite simple, when a Check engine Soon light comes on, have the car serviced. If it flashes, do so immediately. Although Cadillac dealers aren't inexpensive, they can actually provide the best value by not doing (and charging you for) unecessary repairs.

    Many free parts store code readings will only provide the basics on the STS. These are sophisticated cars and the finer details often require more.

  5. #4
    glover is offline Cadillac Owners Member
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    Definately ck intake bolts Prolly needs a new booster hose they swell at the back of the intake. Ck ur air filter if it hasnt been replaced lately n depending on last time u went to a dealer might need a reflash. Otherwise, inspect for any loose hoses n the pcv system

  6. #5
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
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    Quote Originally Posted by Jneedom14
    Please help me i have a 2006 Cadillac STS V8 and im trying to figure out why its running lean its good when i get into the throttle but at idle it is a little shaky not misfiring just stumbling a little. And what all can happen from running lean i dont want to damage the engine.
    You have another thread going about this already...why two?

    HAVE YOU CHECKED THE INTAKE MANIFOLD BOLTS????

    AGAIN, HAVE YOU CHECKED THE INTAKE MANIFOLD BOLTS????
    Past Cadillac's

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  7. #6
    1BadCadSTS's Avatar
    1BadCadSTS is offline Cadillac Owners Connoisseur
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    Ignorance is bliss

    Stupid is as stupid does

    You can lead a horse to water but you can't make him drink

    Anyone else?

  8. #7
    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
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    Re: CEL still running lean

    Quote Originally Posted by 1BadCadSTS View Post
    Ignorance is bliss

    Stupid is as stupid does

    You can lead a horse to water but you can't make him drink

    Anyone else?
    You can lead a horse to water but you can't make him drink but three Texans can. Two to hold his head under water and the third to suck on his a$$.
    curtc and MoistCabbage like this.
    Don't mess with Binky Bear!


  9. #8
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: CEL still running lean

    That horse is gonna drown.

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