ok so i've had my 99 vx for a while now. i bought it in 02 with 19000 miles on it. it's run like a dream ever since. i've never had any problems with it minus a new starter and some brake issues.
however yesterday i drove to get some gas for the lawn mower. it drove fine and there weren't any problems. about 3 hours later i was going to go to the grocery store to pick up a few things. when i started it up it started fine. as i put it in reverse it sounded like it was sputtering a little. but i didnt think anything of it. as i was about a mile down the road i noticed it was running very rough. it sounded like it was sputtering and struggling to keep going. i turned round and went home to see if anything had come loose of what.
about a month ago i had my starter replaced and the guy that did it for me said that there was a vacuum hose that was hanging down there. he couldn't figure out where it went. i didn't think much of it cause it was running fine and i haven't had any problems with it until now. i looked under and saw the hose just hanging there. i cant figure out where it goes to. i did follow it up and it ended near the airfilter housing with it connected to nothing. it doesn't look like that end has ever been connected to anything before. so i figure it's some sort of overflow thing or something like that.

any info on this would be great!