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tc has rough idle

Discussion in 'Member Support' started by tc-batmobile, Aug 16, 2011.

  1. Offline

    tc-batmobile New Member

    Member Since:
    Jul 17, 2011
    My Ride:
  2. 20 Scion tC
    so sometimes when i drive my car when it idles it starts to vibrate/shake
    its not a huge issue and its not crazy more of a VIBRATE but is annoying sometimes and if theres something to do to get rid of it i want to, it doesnt always happen but time to time it will, i constantly drive my tc so i do notice it every now and then any ideas? once i put gas on it it instantly goes away so it doesnt seem like its too big of a problem, its not really misfiring and all the hoses are good
    i cleaned the maf sensor and changed the plugs and it runs a lot smoother i can feel the improvement and the vibrate hasnt been as strong but is still there, its an 06 MT with 86 k and only has CAI and tanabe axleback
    any ideas or anyone experience this too?
    i thought about cleaning the throttle body out on my days off coming up
    (i think the intake shakes a lil that causes some sound but its not what really causes the vibrate to happen, thought i would just include some extra info)
    thanks!
    always premium gas and just did a royal purple oil change
    tc-batmobile, Aug 16, 2011
    #1
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    skatenc123 New Member

    Member Since:
    Aug 20, 2011
    My Ride:
  4. 20 Scion tC
    is this when your AC is on? mine shakes a lil at idles with my ac on.
    skatenc123, Aug 20, 2011
    #2
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    • Staff / Moderator

    CadenceScion Moderator

    Member Since:
    Sep 29, 2009
    Location:
    2006 Scion tC
    My Ride:
  6. 20 Scion tC
    I use 89 octane as well in my o6 tC, the 87 octane messes w/ my idle and resulted in poor MPG's and sluggish acceleration.

    Start up your tC w/ the A/C off and see if it vibrates, then switch the A/C on. If the vibration occurs w/ the A/C on, have the A/C Compressor looked at, it may be failing.
    CadenceScion, Aug 24, 2011
    #3
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    • Staff / Moderator

    navylife59 Super Moderator

    Member Since:
    Mar 22, 2006
    Location:
    2005 Scion Tc
    My Ride:
  8. 20 Scion tC
    It could be a motor mount isolator gone bad. Another common issue on most cars is the exhaust banging against something under the car.
    navylife59, Aug 31, 2011
    #4

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