Stop in for a cup of coffee

interesting any one ever hear of this before? On FBBO

Timing set one year ago, no ping. Just started pining the other day. Bad gas or accidentally put in 87/89 instead of premium....just a guess. Try pouring a gallon or two xylene or toluene in the tank. Use a funnel and watch your paint. Those paint thinners are 105/110 octane....and use one of those two, not just "any" paint thinner. If the ping goes way, then you've probably got low octane gas your last fill up.