Problem rpm Chevrolet s-10 pick_up 1993 2.8 TBI

What is your question?

Greetings I have a 1993 s-10 and recently replaced my idle air control valve because I apparently had problems with the rpm when I turned on the air. Currently I turn on the air and it's stable but after several minutes I'm driving when I stop the rpm's go down a lot as if it were going off. I have to accelerate it hard over 6 to 7,000 rpm to normalize. There is no light in the panel.

How long has your 1993 Chevrolet S10 had this problem?

4 week