I was looking for the drain in the air box, located behind the dashboard, because I thought there must be one, but I could not find one no matter how hard I looked. I looked on line and found some great photos from a guy in UK showing where it should be (attached photos). I finally found the problem, mine was completely full of sand and dust, like concrete, from apparently being driven in Arizona. The dust had completely filled the pipe and opening so it looked like one had never existed! Using coat hangers and drill bits now to clean it out. Good lesson and I will work to keep this open at all times.