Russ, Did you try dialing the timing ahead MORE? All that can happen is that it pings and you roll it back. Most Scouts run best at 10 deg or more anyway. _____Dan Nees_____ cookiedan@domain.elided 3 Scouts, 2 parts Scouts, starting to get lots of parts. http://members.tripod.com/~IHCaholic/scoutindex.html http://www.triplediamond.org