Still having this high idle problem after WOT. Done the procedure that Malcom posted several times. I know this is a problem with the single blade TB. I have been in contact with accufab and they suggested sending it back to them for calibration. It works great as long as you drive slow but once you hit WOT it sticks and idles around 1500 to 2000 rPMs. I put a large return spring on it just to see if it would help but it still hangs high. If you hit the throttle a couple of times it will come back down to about 1000. Hate to send it back but looks like I may have to.