After cleaning my condenser the other day, the first drive caused some engine stuttering until the car warmed up. Then it was fine. Next day I drove thru a puddle and all was fine. Until it sat for while and it stuttered again until it warmed up. Drove thru a deeper puddle last night (right out of the driveway...engine cold) and major stuttering. No...not a hydrolock...intake dry. I'm thinking its a short on one of the O2 sensors. Ideas?