Don't be so quick to blame the ECU. Check resistance across pins 9 and 11 on the plug going to the ECU. If it's open-circuit, the idlespeed thermistor has cacked, or the plug's developed a poor connection. This has the same effect Martin cruznmd wrote: >I recall that recently, we've had 2 or 3 cars, who's idle would occasionally, >and randomly for no reason whatever jump from 700/900 to 2000 RPM's and >perhaps reset once the throttle linkage microswitch had been opened and >closed by tapping the accelerator pedal. The cause ended up being failed >ECU's and someone mentioned that we may be seeing the "end of life" for >these computers. > >Twice lately, I've felt a surge while driving and this morning I was at a stop >light and the engine jumped from 775 to 2000 RPM's until I tapped the pedal. > > 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/