edp1959

I have a '92 SC400. When I first start the car everything works fine, but after I drive for a while and turn the engine off it will not start back up until it sits for about 10 - 15 minutes. The engine turns over, it just won't start until I wait approx. 15 minutes. I've also noticed that sometimes while trying to start during this 15 minutes the radio flashes on and off along with the other electronics. The antenna stops and starts when extending. Any suggestions as to what it might be? Thanks.