01-29-2009, 04:31 AM
I'd say it was because of water getting into your intake, I personally never use the touchless car washes as they do a horrable job at washing, as they miss dirt everywhere, but it's the air jets that might be the cause of this issue as it forces the air into places as it's not drying your car correctly.
I was the only member on this board with a Yellow Focus Sedan, and a 2002+ Euro Facelift on a sedan.