Had a weird problem where my Formula STX all of the sudden didn't want to idle on it's own unless I cranked the idle screws way in to keep the rpm's up in orbit. Ran fine with some rpm's, just didn't want to idle on its own. The culprit?? One of my plugs had it's nut on top come completely unscrewed and the only thing holding the plug wire onto the plug was the friction between the boot and the ceramic of the plug. [:0] Took 15 seconds to fix, but I was scratching my head over this one for a little while now...