Mine started idling exactly like this when I slightly bent the connecting arm between the accelerator cable spool and the arm that holds the idle microswitch. The bend wasn't visible but it had the effect of shortening the arm just enough to pull the butterfly valves open a hair, just as if I were applying a little throttle. It would idle between 1500 and 2000 no matter what I did. With your engine idling, try pressing the idle switch arm towards the switch and see if the assembly moves a little more, enough that your idle becomes normal. If so, there are notes in the tech section on resolving this problem. The arm is easily removed (one clip beneath the spool) and length-adjusted by screwing the end ball in/out as needed. Wish I'd found the notes BEFORE I spent two days figuring it out myself. :) Not saying this is it, but it was on my car! Marv #10820 AZ-D --- In dmcnews@xxxxxxxxxxxxxxx, "dmcchaser" <dmcchaser@xxxx> wrote: > > Hello all. > The idle speed on my D is too high ~1800 rpm warm. I've read the > "Discussions on Idle Speed" and everything checks out. The throttle > plates are correct, idle switch and ISC system work, no vacuum leaks, > the brass screws in the throttle body are fully seated, all o rings, > gaskets and seals in the plenum are new. > I'm out of ideas for now and I'm hoping someone else can help. > Could the backfire valves in the throttle plates be leaking? > > Matt Smith > 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/