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Car 'bounces' >70mph

Discussion in 'Model S: Driving Dynamics' started by nwdiver, May 8, 2017.

  1. nwdiver

    nwdiver Active Member

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    I've been experiencing this for awhile. It's not too severe and it's intermittent. I've had the wheels balanced twice and it doesn't occur at all below ~60mph. I don't think it's the wheels since it's intermittent and it's not there at all at lower speeds. The only thing I can think of is that there's some kind of resonance occurring that the suspension isn't buffering out for some reason. It's really odd. The car will be perfectly smooth... then it'll start bouncing... a little at first then worse and worse... then subside and go away only to start again spontaneously in a few more minutes. Thoughts? Anyone else experience this?

    I've got a 2012 P85 with active air suspension, 19" wheels and ~108k miles.
     
  2. ecarfan

    ecarfan Well-Known Member

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    How odd. Have you taken a Tesla service person with you on a test drive so they can experience it? I assume it is reproducible.
     
  3. mspohr

    mspohr Active Member

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    I've not experienced this... What is the period of the bouncing?
    With the air, have you tried different ride heights?
     
  4. nwdiver

    nwdiver Active Member

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    ~3-4 Hz maybe? I've tried standard and low with no noticeable effect...

    Not yet... it's gotten a little worse recently... I'm gonna swap to my summer 21" tires soon... see if that has an effect.
     
  5. animorph

    animorph Member

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    Sounds like shocks to me, especially with that mileage.
     
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  6. nwdiver

    nwdiver Active Member

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    Yeah... that's what I'm thinking... anyone know how much that'll cost me? :(
     
  7. Lasttoy

    Lasttoy Member

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    This is strut, not a shock, it is very different
    There were a few on here for sale
    Looks very easy to change, one bolt on bottom and 3 on top, just getting to top might take a few mintes
     

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