[Ayrton Senna]

I installed a K&N air intake system in my 2003 Carrera 4S and also had a GT2 type wing added. The wing includes two large horizontal scoops for direct air intake to the K&N filter, which has increased performance significantly.
One problem which has occurred, albeit rarely, is that when using a powered car wash, the car will sometimes stall for a few times after departing the wash. I suspected this to be because too much water was entering the K&N so I made two deflector plates so only indirect air (and accompanying water) now enters the filter. Still, however, there is an occasional stall.

Any advice? Please don't tell me to remove the filter and/or wing - these look and perform just too darn good.

Thanks in advance.