Sled starts pretty good and idles smoothly at 1500 rpm most of the time. Once in a while it starts and runs at 1400 and doesn't idle smooth at that rpm. I need to blip the throttle to get it to run at 1500. Also when I hit the reverse button it will go into reverse but idles at 1400 rpm and wants to quit unless I give it a bit of throttle. If I let off the throttle it will quit in a few seconds. When this happens the voltage indicator on the guage display shows full voltage but headlights go out and display goes blank and resets itself like when you first start machine. Ideas anyone? Could this be a TPS misadjustment?