wow can't belive you would take such a prized item through a car wash first off ..
anyway the points above sound valid .. sounds like a fuel issue as usually no spark is no spark .. you are at least starting and strugle for a bit.
but if that water blasted down through your rrar grill your ignition could be totally saoked .. from leads all the way to cap and rotor.
i would NEVER take my Porsche through a car wash .. even if you guarentee that recycled water has absolutely no sediment in it ( which you cant ) . the soaps they use to clean your car without touching it are very harsh and im sure would more than strip away your prized wax job.