idle issues 2012 pro w/boondocker turbo

I just had my sled into dealer for a pre-season service. I picked it up after-hours and reverse did not work. It was idling low (1350-1400 rpm.) As soon as I tapped the throttle it revs up and returns to a high idle (2250-2400.) I tried to recreate this in the garage once I got it home to make a video.

While it was at the dealership they told me the TPS was reading "Unrealistic." I am not sure what this means. They tried to replace it but said the problem was not fixed and they would have to replace the throttle bodies, which include a new TPS. I opted out of the new throttle bodies since it ran well when I took it in and I don't want to stick a pile of money into a 6 year old sled. So they reinstalled the old TPS, per my direction.

Now I have a sled that idles goofy and no reverse! I am somewhat disappointed that they returned it to me like this without telling me. However I realize that I also directed them to install the old part. The other kicker is they are 7 hours away so I can't very easily drop it back off for them to look at.

I need help! should i try to adjust the TPS and go from there?

https://www.youtube.com/watch?v=N5nwluz9tjI

https://www.youtube.com/watch?v=sPcCd8mj7I0

https://www.youtube.com/watch?v=k08Vea7Tjgw&t=1s

Thank you. I should have mentioned that I had them install new VForce3R reeds while they had it apart.

Problem solved by adjusting the TPS sensor. Thanks for the pointers!