SM5 3100 miles. I made 4 stops today. After 4th stop idle was at 2200 rpms. It usually is 1550-1600 rpms. Stayed at higher rpms for the next 10 mins. Even going through the gears. It felt like the throttle was sticking, but it was not. Made 1 more stop. Shut it down and fired it right back up. 2200 rpms. Went in the store for about 10 mins. When I started it this time everything back to normal. Any ideas to what caused this? Have I missed a thread on this subject?