I've been having surging at light throttle. I was also getting bad gas mileage(running rich). Found out I had an exhaust leak right next to my O2's on my Pacesetter LT's. O2's were seeing extra oxygen and it caused the car to run poorly and surge at light throttle. Now even with my medium sized cam I have no cam surge.

Just thought I would post this because I've seen a ton of posts on here that describe pretty much the same problem. Oh by the way I picked up 3 mpg.