i had a very similar problem .. didn't involve water .. in my case it did reset it self by cycling the key in the ing. swich , so i knew it was electrical ... then i found that the 6 ground wires 3 black and 3 brown were corroded inside the crimping of the conector, where the bolts hold it agains the intake manifold ... well i cut part of the wires and install new terminals and the problems when away ... at lease for now 3 weeks and has not re- apear ...


hope this helps some how


coper
90,91 740 ti's , 82 242 glt .