S2000 Under The Hood S2000 Technical and Mechanical discussions.

Idle stumbling and revs sticking when decel.

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Old Jun 19, 2009 | 03:40 PM
  #11  
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How about the cleaning procedure for Intake Idle Control Valve?
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Old Jun 19, 2009 | 05:24 PM
  #12  
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I'm gonna try cleaning and testing etc but first just wondering if anyone knows what could cause it more when the ac is on.
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Old Jun 24, 2009 | 09:48 PM
  #13  
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Damn idle hasn't stuck again so can't try pulling the pedal up to test. The stumbling and bogging down/revs dropping has only happened when the ac is on. If it starts and I then turn the ac off the idling gets normal.
Would the likely issue still be the tps or map sensor?
Driving back up to ny shortly so would love to have this issue fixed by then.
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Old Jun 25, 2009 | 07:53 AM
  #14  
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Originally Posted by Deception,Jun 7 2009, 10:54 AM
when the revs stick at 4k, put your foot under the gas pedal and pull up. If the RPM's drop to normal its a mechanical issue (throttle cable/ throttle body)
The throttle cable pulls the butterfly valve open on the throttle body when you push down on the gas pedal so how is pulling up on the gas pedal with your foot going to do anything? All that is going to do is create more slack in the cable assuming the butterflyvalve is stuck.
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Old Jun 25, 2009 | 08:13 AM
  #15  
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I'm thinking that the throttle got stuck because a while ago I painted the area where the cable attached since it was real
Nasty and rusty and all. Probably during long drives in the heat the paint got a bit sticky and stuck a couple times. Ac idle issue is the problem now.
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Old Jul 8, 2011 | 08:24 AM
  #16  
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Originally Posted by Moddiction
I'm thinking that the throttle got stuck because a while ago I painted the area where the cable attached since it was real
Nasty and rusty and all. Probably during long drives in the heat the paint got a bit sticky and stuck a couple times. Ac idle issue is the problem now.

Wondering if you got this AC idle issue fixed? Any solution?
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Old Jul 8, 2011 | 09:39 AM
  #17  
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Sticking IAC valve will cause a high idle.

If you have the proper tool bit (you wont, you will have to buy it. its a five point torx called a pentacle bit...avail only online or tool trucks) you can take the motor portion off the IAC valve. There is a little shaft in the IAC that turns on tiny bearings. you will find this shaft does not turn freely.

Clean it out, and spray it with WD40. get that shaft to spin freely.

Enjoy your super smooth idle.
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