Hey thanks guys, it ended up being a PCV valve. In fact, although the check engine light wasn't on, it pulled codes p1506 and p1721 I think it was, anyway IAC high idle, and rich bank one and two... The PVC valve replacement cleared the codes and got rid of the lagginess. Says a lot about their motors. 300,000+ miles and still running strong. (odometer broke at 261,000 though, so not positive of mileage)