2006 apex will not idle

[Rocker1]

Hi guys new to forums. I have been having same to similar issues with my 06 Apex RTX. I have owned it since new and just started having issues. When I start it up it idles at 2000 rps and drops down to about 1600rps. It has started to idle rough during worm up with a little stumble. If I give it a throttle pop or take off to a short stop it stalls. I am able to start it back up and can be good. Sometimes for the rest of the day. Unless it cools down for a while. Exhaust gaskets checked and good. Plugs changed. fuel tank breather open. I adjusted the CO from stock 0 to -5 and turned up idle screw just a bit. Any ideas what I can do next? Is it this TPS sensor you guys talk about? Is it plug and play?