REALLY need help w/ 88 DX PLEASE !! idle speed going crazzy!

My car has been giving me major trouble in the past few months. The idle is all over the place. It will sometimes run so low that it stalls out. I replaced the O2 sensor, week and a half ago. This made the trouble stop temporarally. Now it is back and worse than before. The ECU flashes Throttle angle (7) when I adjust the idle down, and the problem stops. But when I crank up the idle speed the Check Engine light goes off. If I leave the idle up it has bad problems?
Friends have suggested everything from the idle screw, MAP sensor (no indicator), Throttle Position Sensor, Or a huge vaccum leak.

If anyone has any suggestions as to what my problem may be I would greatly appreciate your input.

TPS sounds like the problem to me.

yeah, that sounds like your throttle position sensor to me also