sign that cat's about to go... or already gone...
you can goto an autoparts supplier that carries a chemical to put in your gas tank to relieve it somewhat/ it's just a band-aid though & most likey in need of a new replacement cat, but if it works out for u--> the better!
something like this:
http://www.jcwhitney.com/autoparts/P...+10214/c-10114
