Excessive high idle speed, 2007 Street Glide

Discussion in 'Touring Models' started by lightning, Apr 8, 2009.

  1. lightning

    lightning Member

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    My buddy has a 2007 Street Glide bought new having had a 110 performance upgrade. Not long after taking delivery he began having trouble with the idle often near the 2000 rpm mark after coming to a stop. Blipping the throttle will not bring it back down, nor any other attempts. As usual it doesn’t always act up especially when he took it back to the dealer. Dealer says unable to duplicate condition. Yet as if it has a mind of it’s own, suddenly after coming to a stop the idle stays very high.
    Any ideas????
     
  2. TXMikey

    TXMikey Junior Member

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    Is the idle high when he starts it up? If so, it could be because he's not letting the idle drop before shutting the engine off. Also, make sure he is shutting the engine off with the kill switch before turning the ignition switch to off. There's something in the ECM that monitors idle speed and will go to a higher idle if it's turned off high, and it takes several start/stops to recalibrate.
     
  3. Bud White

    Bud White Well-Known Member Retired Moderators

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    only applies to 2008 with TBW if im correct .. the 07 still have cables
     
  4. lightning

    lightning Member

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    No the idle is normal at start up. The condition is hit or miss. I thought I heard the condition you mention shutting off engine with ignition applied only to 08 or newer models with throttle sensor not with throttle cables. Am I getting my facts mixed up?
    I thought perhaps he might have a problem with a vacuum leak but with all this electronic stuff that would be to simple.
     
  5. R. Lewis

    R. Lewis Senior Member Retired Moderators

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    Has there been any other mods. with this scoot ..i.e. new grips,bars,risers,cables?
     
  6. glider

    glider Veteran Member

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    Problem probably is with the IAC (Intake air control) which is a stepper motor that opens and closes to give you the bypass for the idle speed. If it hangs up or malfunctions the idle speed will be effected as a result. Cleaning or replacing the IAC in the throttle body is the only way of remedying it.
     
  7. TXMikey

    TXMikey Junior Member

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    You're right...my bad. :bigsmiley25:
     
  8. jdaws

    jdaws Active Member

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    Glider is correct. The IAC is the only thing that can control the ilde if the throttle is closed,unless you have an air leak afler the throttle body. Make shure you dont have a loose connector or loose pin fit at the IAC.
     
  9. lightning

    lightning Member

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    Thanks guys, I'll pass this information on to my buddy.
    And yes there were the usual upgrades that typically go along with the 110 performance upgrade such as gear drive cam, performance cams, heads etc…
    Bars were not changed but grips were. Doesn’t seem to be a problem with sticking throttle cables; but perhaps as Glider said the IAC would be the first place to start other than looking for an air leak.