ok, so i noticed my timing was off a bit, so i adjusted it. it was supposed to be set at 10, but it was all the way at 18. so i fixed it. well, today i noticed it was off again...so i go to check it, and the timing is jumping from 8 to 10 to 18 back down to 7 then back up to 18...what the hell. anybody know what is making this happen???