Fog Horn Sound When Accelerating?
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  • 1 Post By Panzer Leader
2008-2013 Cadillac CTS General Discussion Discussion, Fog Horn Sound When Accelerating? in Cadillac CTS Second Generation Forum - 2008-2013; On my way to work this morning (about a 7 minute drive) about halfway through I noticed my car making ...
  1. #1
    Vance9991 is offline Cadillac Owners Member
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    Fog Horn Sound When Accelerating?

    On my way to work this morning (about a 7 minute drive) about halfway through I noticed my car making a sound like a low fog horn in the back! I've never heard this noise before so I was very concerned. It is very cold out and I had the car running about 5 minutes before leaving this morning so I didn't know if that had anything to do with it. Thanks!

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    hauler's Avatar
    hauler is offline Cadillac Owners Fanatic
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    Re: Fog Horn Sound When Accelerating?

    OK, I'll guess first, not knowing how old the car is or how many miles on it, or whether it makes the noise moving and/or standing still: muffler or exhaust pipe, snow packed in the wheel well, door or tailgate seal leaking air, wheel bearing, differential gear lash......

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    Vance9991 is offline Cadillac Owners Member
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    Re: Fog Horn Sound When Accelerating?

    2009 CTS Premium AWD 41000 Miles sorry for the lack of info! I appreciate the response though! Only when I'm accelerating

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    HR-cts is offline Cadillac Owners Fanatic
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    Re: Fog Horn Sound When Accelerating?

    Ice stuck in the wheel wells and rubbing on the tires?
    Ice stuck inside the tailpipes? Did you reverse into a snow bank and pick-up some snow which has now frozen inside the pipes?
    stone got lodged between the brake pad and the brake disc?

    Usually such noises used to happen when the fan belt would slip, which is what it would do 90% of the time when very cold and the belt is a bit loose.

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    Vance9991 is offline Cadillac Owners Member
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    Re: Fog Horn Sound When Accelerating?

    Thank you for all your responses! There is actually a good amount of snow packed in the wheel wells (damn ohio weather) so I'm going to set it in my dealerships garage tonight to let the snow melt before I go home.

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    hauler's Avatar
    hauler is offline Cadillac Owners Fanatic
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    Re: Fog Horn Sound When Accelerating?

    Quote Originally Posted by Vance9991 View Post
    2009 CTS ! Only when I'm accelerating
    If it's there when the snow melts, I vote for differential or wheel (spindle) bearings.

  8. #7
    Panzer Leader's Avatar
    Panzer Leader is offline Cadillac Owners Enthusiast
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    Re: Fog Horn Sound When Accelerating?

    Could be a ship trying to pass you....LOL .....
    Mistercoffee2 likes this.

  9. #8
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    Re: Fog Horn Sound When Accelerating?

    Hello Vance9991,

    We hope that some of the advice here has helped with your concern. Please keep us posted on the outcome, and if you need any assistance communicating with the dealership we're here to help.

    Amber N. (assisting Laura)
    Cadillac Customer Care

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