the high idle was part of a surge was part of the charging system malfunctioning.
This referrs to my son always leaving the seat heater on, he says it works when it doesn't. So I in turn leave them on. So one night there's a vibration under the passenger seat, and then zap. The battery drains. I go completely dead in a church parking lot. Towed home.
Today tightened up the alt. belt and charged , turned off the shorted seat heater, of course.
Everything AOK