HardHitter

Ok, I took my 8 in for the recall a couple days ago, and I got the car back and I've really noticed lately that whenever I first start up the car, my idle is horrible. It jumps from 1000 to 1500rpm back and forth really quick. My car never did that, it would stay at just 1k or maybe a little lower. It seems like it only happens when the car first warms up. I know that when you first start the car it usually is around 2k before the car warms up, mine did that before, but it never would jump around like it does right now. Anyone else have this after their recall and what can I do?