My mechanic told me at the beginning of the season that it was starting to go bad because it was taking to long to unchoke after the warm up process. I have noticed especially on hot days it can take several minutes to idle down. I was just curious to know what symptoms of a failing pack would look like. Its not an issue to rip it out and replace it, but before i drop a couple hundred dollars on one I would like to know more of what to look for.