I've been experiencing a high idle speed. When the car is cold, the start revs kinda high, then idles about 1500. Today, hot car, hot outside, 1100 rpm. It'* higher than it used to be before I put in the new pump 300 miles ago. I replaced an old/cracked vacuum line on the main vacuum manifold. Got a smoother idle, but no change in speed.

Any ideas?

Something in the tranny maybe?

When it'* in park?

Yea, had a Taurus that Idled high in park, then fine in drive.

Have you checked your IAC valve to see if its clogged with carbon? This adjusts your idle on the t-body....it'* bolted right on the throttle body -- maybe some has a pic they can share that willl show its exact location.

I'd take that little guy out (careful not to strip or break the bolts) and clean it up.

I know where it is, and, oddly enough, I have a clean spare. Maybe I'll swap em.

It wants to move faster when I let off the brake, also. I don't think it'* tranny related. It is reducing my gas mileage, though.

Dude, it'* not the IAC. If that were gummed idle speed would reduce.

I suspect a leaky injector.

Maybe the carbon is uneven, leaving gaps when the IAC thinks it is closed. You never know. A leaky injector would not make me happy, but I did just send out my originals to get serviced.

I don't know guys, it was just a guess, I was just trying to think about all the parts in the system that control idle....how about the TPS, could that be suspect as well?