D2, If you can adjust your CO so the needle is pegged (100%) I would be very surprised. You also took this line out of context. "If your dwell meter has no scale for four cylinder engines than just adjust the CO to the maximum swing of the needle." As you adjust your CO, and the ECU is working, the needle will pulse or swing, it will NEVER stay at maximum swing, therefore the average of the swing is the obtainable reading. The next line in my email states that the owner would have to test drive the car and perform additional adjustments as required. Since he obviously didn't provide a picture of his dwell meter it is difficult to provide precise information on how, the owner, is to read his meter. As providers of information we can only reply in broad based answers. I also said that a lean mixture would make the car harder to start, meaning if he adjusted the CO to the maximum, then he would probably have to make further adjustments, richer or leaner.. If you would like to continue this debate we can do so off line. Dave Sontos vin 02573 ----- Original Message ----- From: <doctorDHD@xxxxxxx> To: <dmcnews@xxxxxxxxxxxxxxx> Sent: Monday, February 06, 2006 8:57 AM Subject: [DML] Dwelling on da dwell... 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. 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/