My 89 has recently started doing this. I could find no leak whatsoever. Only happens at the high pressure wash.
The water was coming in through the cold air ducts and pooling at the bottom of the fan housing (behind the glove-box). As far as I can tell..this is merely a design flaw.
there is indeed a drain in the cowl vent and it plugs very easily. You need to remove the cowl and clean the drain thouroughly (try compressed air)
I'll let you know if I dig up anything else such as a fix or solution.
<small>[ September 20, 2002, 03:57 AM: Message edited by: steevil ]</small>