You could well have an ECU problem. Idle air regulator responds to it's signals. If you want to bypass CIS, there's a manual idle speed circuit already built into the upper air assembly. eMail me off list (brobertson(at)carolina.net) and I'll explain how to use it. Note that this is *NOT* a modification -- you simply deactivate CIS and reactivate the manual circuit that preceded it. Can switch back whenever you want. Or you can just crack the throttle plates like an old fashioned carburetor (a List member is currently idling so with excellent results). Note that either non-CIS method will not give you fast idle without additional hardware (aux air valve). Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, "dukeofclassiccars" <tswatch@xxxx> wrote: > Well, I bought my first DMC about 3 months ago and been spending a > lot of time fixing up the mess of the previous owner. Unfortunately > I'm stuck on one last problem. I have a constant high idle speed of > 1,900 RPM. Twice what it should be. 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/