Dave Sontos, You wrote this, but I'm not sure it's accurate. Maybe I'm not understanding what you mean by "If your dwell meter has no scale for four cylinder engines than just adjust the CO to the maximum swing of the needle." If the needle were to swing to the maximum or 100% then that woluld mean the frequency valve would be on all the time. Please clarify for us. Thank you, D² & 6530 Dave Delman [Non-text portions of this message have been removed] To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/