Hey I have a 1990 GA and I have the same problem but only on the driverside floor and only after a heavy rain if you figure this out please email me at richardbeachy2000@yahoo. Com
March, 8, 2009 AT 9:37 PM
Is the wet area in question water or is it antifreeze? If it is antifreeze I would say yes you probably have a heater core leaking but if it is water then I would suggest looking around under the hood below where the windshield meets the hood and make sure there are no leaves or anything else plugging off the water drains that allow water to run off.
Also if it is water and you are in an area where you run the AC alot the it could be that the evaporator drain is plugged.