After having the car washed the engine started to buck driving 40 MPH?

I went to the car wash its winter in Minnesota so it's kind of cold and I decreased the engine and washed it, then when I left within 3 minutes it started to buckle. So, I slowed down and then it was okay for 5 minutes and it did it again. Made it home had someone look at it and dried it in the garage overnight took it for a ride it was okay that evening. Then the next morning I drove it after 10 minutes going 45 to 50 started to buck again. I don't know if the transmission or the engine is still wet a sensor got wet, I'm not sure do you think after it dries for a while, I can drive it and see if the problem still continues or maybe it might fix itself on its own. Any suggestions? I just don't have the money to put into this anymore. Thank you