Ok i have got a 2005 EZGO golf cart and it seems to run good but it's smoking pretty bad. The vavles are adjusted right on it. The thing is you can put a new set of plugs in it and run up the road and back and they look like they are almost fouled out. Do you think this could be i need a new set of rings? If not that what are some other things that could be causing this? THANKS IN ADVANCE!!!!!