Originally Posted by Twip

i would get some tb cleaner and a rag. spray some on the rag and get in there and clean the ***t out of it. i will give you a better idea.. plus there should be a hole in the butterfly. i might be mistaken, but if there is, make sure that you clean that out too. if you are having rough idle or something similar, like surging, that little hole being plugged might have caused it. as far as that gouge down in there, there is probably not much you can do besides clean it from time to time. i wouldnt worry about it too much.

Does it backfire through the intake much?