I've made some progress: Turns out the full throttle switch is bad and shorts to ground regardless. That's why the lambda system wasn't taking control of anything. I've disconnected the switch for now. Current issues: 1. With the full throttle switch disconnected, the dwell meter drops way down - not quite to zero, but close. It still doesn't pulse. It does sit on center when cold and goes down low when warm. 2. The frequency valve quits buzzing when I disconnect the full throttle switch! So the lambda unit isn't doing anything with the FV. If I plug the switch back in (make the system thing it's at WOT) the FV starts buzzing again. 3. Where the full throttle switch plugs into the wiring harness, there is place for two connections. One is for the switch - what's the other for? Mine is disconnected. Now what do I do? -Ryan 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/