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The idle is controlled by a device called "IAC motor". It's located on the throttle body. It can be either extremely dirty or just inopperative.
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What causes a 1987 wrangler with 2.5 to have a really high idle?
its either a vacume pipe leak or in my case a bad throttle position sensor
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tps throttle position sensor
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Look and listen for a vacumn leak under the hood.
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How high is your idle? idle should be 800rpm good oil pressure is obtained at this idle
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What causes high idle and then rough high idle when heater is turned on?
Vacuum leek
When you start your moped it is getting way to much gas and the back wheel starts going really fast?
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There really isn't an adjustment just the IAC valve which may be dirty causing the idle to be too high or too low so the Idle Air Control valve has to be cleaned or changed.
