Quote Originally Posted by ranj
on the under side of the throttle body their is a idle air control valve some people call it the fast idle valve replace it.
Those are two different things. the FITV is on the throttle body. The IACV is on the intake manifold iteslf. depends on the engine, but on B series i think it is on the back of the intake manifold just where the throttle body bolts up. It has two wires coming from it and two hoses. The FITV is on the bottom of the throttle body. 75% of the time if you have an idle surge problem (not leak related) it is the FITV. There is a bronze colored plate on one side of it with two screws holding it in. take it off. Inside there are two pieces. One piece is a large cylinder that is threaded on the outside and screws in and out of the passageway inside the FITV. chances are that it has backed out. It has a notch on either side of it. Screw it all the way back in, then a half turn out or so. its summer, so you wont have a problem with cold idle, but when winter comes around, you may need to adjust.

Take it back to the mechanic that "fixed" it and tell him to remove the throttle body and adjust the FITV.... and that you want a partial refund for your trouble. You could have replaced two hoses and cleaned the IACV for about $20 and in about 15 minutes anyway.... I guess he charges $1000/hr for labor.. then never take anything back there again.