Question about 1994 Ford F350 Crew Cab

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High idle when in drive

Ford f350 460 ci gas engine goes into a high idle when in drive and back to normal idle when in park or nuetral

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  • pfun4 Feb 18, 2009

    my 94 bronco is doing something similar. when i start it it idles really high (2000 rpm) and slowly comes down to about 950. buit if i put it into drive or reverse the idle will go down slightly for a split second then go back up to aroun 1300 rpm. when i put it back into park or neutral it slowly goes back to normal. i know its iac related because i can unplug it and drive around fairly normally for the most part and i know its not the tps because i just replaced that and the readings all check out. i tried unpluging the battery but only for a few seconds, will more time really make a difference?

  • Anonymous Mar 28, 2014

    accelerates on its own while driving,high idle when car is in park

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Sounds like a faulty TPS sensor, also could be the ECM playing games with you,,,try disconnecting the battery for about 20 mins,,then reconnect,,it may clear it up.

Posted on Jan 17, 2009

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