I have a 2016 FiST that I've had for a little over a year now and around the year mark it started doing this thing where if I started it cold and drove it would be fine, but if I stopped and shut the car off to go into the store or whatever and then went to start it, by the time I shifted into second and get to around 2k-2.5k RPMs it would just lose all power and when I came to a stop it would idle at around 500rpm until I shut it off and started it again. It got progressively worse until I parked the car for about a month and a half until about 2 days ago when I went to pull the plugs and check them and the coil packs at the request of a friend. I cleaned the plugs and started it and it sounded like a tractor at idle. Any ideas?