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Strange noise

Discussion in 'Model S: Driving Dynamics' started by Fred6936, Jul 2, 2013.

  1. Fred6936

    Fred6936 Member

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    Location:
    SC
    Have strange noise coming from front left, model S, any ideas, service does not seem to hear?????:scared:
     
  2. scaesare

    scaesare Active Member

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    3,930
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    NoVA
    That's a bit light as a "problem report".

    -What does it sound like?
    -How long does it last?
    -Under what circumstances is it triggered?
    -Do you hear it inside or outside the car?
    -At rest or while driving?
    -etc...

    See also: Problem Reporting Guidelines
     
  3. Fred6936

    Fred6936 Member

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    Location:
    SC
    Noise is audible after 15 mph to 100mph inside the car, does seem to change with road conditions,(at times) audible from the left seats, but can be audible from the right seat but not with the same intensity. Help
     
  4. mknox

    mknox Well-Known Member

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    Toronto, ON
    Wheel bearing??
     
  5. Zapped

    Zapped Model S - PURE EV

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    Aug 8, 2012
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    Location:
    YEG <-> PSP
    Gear box ?
     
  6. Beavis

    Beavis Signature 991

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    Location:
    Colorful Colorado
    Gremlin?
     
  7. huntjo

    huntjo Member

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    Location:
    Fort Collins, Colorado
    Left someone in your frunk?
     
  8. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    Pulsating, whine, low pitched? Ambient lights on? There's just not enough information here. Any chance of recording it?
     
  9. Zapped

    Zapped Model S - PURE EV

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    Slight vibration though the left foot rest ? I'm feeling that... ( no... not nerves at 100mph )
    Anyone know what symptoms if any the nut/washer fix on the rear axle was suppose to address ?
     
  10. Fred6936

    Fred6936 Member

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    Good idea on the record. No lights, more of a throb. thump thump. Not tire sound. Thanks
     
  11. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    Get someone to drive the car and then do the pencil test to isolate the frequency.

    Procedure:

    - Get a pad of paper, a pencil or felt tipped pen, and a watch with a second hand.

    - Pick a road where you can drive at the same speed for several minutes.

    - When the vibration starts tap the pencil on the pad in time with the vibration. Do this for exactly ten seconds.

    - Repeat a couple of times so you can get an averaage

    - Count the number of dots for each ten second run and multiply by six.

    The number you calculate will be the vibrations per minute. Then compare that with known components such as the the RPM of the tires.

    This method eliminates anything that doesn't revolve at the RPM that you calculated.

    Automotive noises are very tricky because they appear to come from the place that has the best sound conduction qualities (e.g. a hole in the firewall) rather than the source. Sound reflection off the hard surfaces (e.g. glass) doesn't help matters any.
     
  12. Zapped

    Zapped Model S - PURE EV

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    #12 Zapped, Jul 4, 2013
    Last edited: Jul 4, 2013
    Just solved my strange noise / drone. Turns out this was already discussed but I had forgot about it.
    For the rear hatch there are large thread type adjustable stoppers on car body left and right side.
    I know I adjusted these a few months ago but they seem to have threaded back down to the lowest setting which has made the hatch somewhat loose again.
    I raised the stoppers with a 1/4 - 1/2 turn and noise / rumble is gone.

    Pressure Buffeting - Has anyone experienced it? - Page 2
     

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