See Message #74176. If your vacuum advance solenoid isn't plugged in, and if the vacuum lines are set up per factory design, and if the vacuum advance diaphragm doesn't have a hole in it, you have way to much spark advance at idle. There's no way to properly tune the rest of the engine like that. Unplug the vacuum line at the distributor and check for vacuum at idle. If it's there, you're going to need to resolve that issue before proceeding any further. Regarding the engine mysteriously dying: Have you ensured CIS is OK? Mine died at a stoplight. Butterfly in the idle speed motor closed and would not reopen. I had to nurse the car home by cracking the throttle plates at each stop with the accelerator pedal. That's when I figured out how the manual idle circuit worked -- and threw CIS away. Before flaming me remember: my engine at that time was a B27E. CIS was grafted onto it (with no provision for an idle microswitch, it was hard wired active all the time). The idle speed motor may have simply burned out due to continuous use. There's absolutely nothing wrong with activating the manual idle circuit to see if your random dying goes away. If it does, Bingo -- CIS is sick. Didn't your car come with the manual circuit open? I remember well intentioned people telling you to close the brass screws. They may have forced you into problematic CIS. There's a procedure for manually idling the engine in the Files section of the Yahoo website: http://autos.groups.yahoo.com/group/dmcnews/files/Other%20PRV%20Literature/ Properly functioning CIS is a beautiful thing. Sick and failing CIS is a pain in the arse. Bill Robertson #5939 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/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> 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/