idk, just check around the intake system, from the filter to the intake mani, make sure everythings hooked up and not like falling off or something, thats all i can think of, haha.
Cleaning the TB and butterfly should do the trick. Make sure u use a throttle body safe cleaner, so you dont damage ur sensors. Also make sure u pull the trottle cable so the butterfly is wide open. That way u can spray all that gunk inside as well. Do a little bit at a time, start ur car and rev a little to burn off the cleaner/debri. Repeat the process as neccesary. Spraying too much TB cleaner at one time might cause your car to be very difficult to start.