I have a 2000 sport nautique that is having a very high idle and then it will die when you put it into gear. It will start right back up, but does the same thing again. It has the gt-40 motor in it. Ran fine last season just wondering where to start at. I am leaning towards IAC or the tps, but I don't want to just start buying parts and trying if I can pinpoint it I would much rather do that.