O. K. I changed my throttle body this after noon. I went from a 58mm ( 86' GT ) to a motorsport 65mm. I took it for a test drive and it ran fine. When I got back I wash the car. I also washed the engine. I took it out after that and when I gave it gas it sounded like crap. It sounds like it's misfiring and really chopy. I wasn't far from my house when it died. I pushed it into a store lot, but it wouldn't start. I did get it home and it is now back in my garage. It seems to misfire and run rough after 2300 rpm's or so. Is it the throttle body or is it from the water ?