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High Idle on start up

(1999 Ford Expedition)
in El Paso, TX on October 23, 2013
I was getting high idling while driving not while starting up found that the Trottle Sensor was bad again ,I had replaced the Trottle Position Sensor and Idle Control Valve back in March 2013 due to rebuilding just put everything new. I'm now getting a high idle when starting up after replacing Trottle sensor again. Would it be the Idle valve to again.
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Popular Answer
on October 24, 2013
Possible vacuum leak.
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of Greg's Orange Auto on October 24, 2013
agree with pushrod or tps is misadjusted
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on October 24, 2013
You may have a vacume leak causing the fast idle. Also have seen a stuck PCV valve cause this a few times.
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