Try this.....unplug your ECU and start the car. If the idle is fairly normal then you've found the problem. Chris 6301 > > 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/