I washed my engine today. I know you're not supposed to wash it when it's hot, but what I did was let it sit overnight and then moved it this afternoon and washed the car and then the engine. After that I let it idle for a little bit (probably about 10 minutes) and now the car is running rough when I drive it. On the access road in 5th gear going 42mph it felt like it was bouncing a lot. That's the only way I can describe it. Any ideas?