Mtnm2

My idle is all over the place sometimes it will idle at 1200rpm, sometimes it will idle at 2500rpm. Idle air motor??

strokedls1

iTrader: (1)

Idle air plunger may be not working or sticking. Try cleaning the plunger with some brake cleaner. If that doesn't work you may need to replace the sensor.

_JB_

iTrader: (33)

I paid $50 for my IAC on my stang I think. I cleaned my OEM IAC and my car started to idle wierd, so I bought a new one. Now my car still doesn't run right.

Mtnm2

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Tommy Tucker

It's probably the stepper motor in the IAC that's stuck. Undo it and lubricate it , then gently push it back in to it's base position.
If it's broken or the sensor is playing up, just disconnect the sensor and fix the idle on the screw while you wait for the new parts. You won't have any cold start help but it will see you through temporarily.
Good luck.