I've checked the idle speed microswitch and the idle speed motor and they're both working, as far as I can tell. (BTW, the idle speed motor is not original -- it's newer. And so is the vacuum solenoid.) My problem is that I can't find anywhere to plug in the other end of that lead! Here's a photo for reference I found this morning on John Hervey's website: http://www.specialtauto.com/delorean-parts/images/wiring-harness-back-eng.jpg What I've got is the end with the black wire and the two blue-striped wires and nothing up there to plug it into. Hervey's website says it's "usually behind the intake manifold." I'm not driving the car today (Arr, for there be rain in the forecast today, matey!), so when I get home, if I have the time, I'll take the manifold off and see what I can find down there. Thanks! Cheers, Farrar Hudkins #2613 On 2/5/08, content22207 <brobertson@xxxxxxxxxxxx> wrote: > 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. 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/