endotex23 wrote: > >Martin, the ECU sets the motor to a default duty value when that input >is brought low. It's the same default value as when the tach input is >lost. One of the ways (there are several but the manual only gives one >as I recall) to test the idle speed loop is to disconnect the switch >when the throttle plates are fully closed and observe a rise in RPM as >Elvis points out. > Hmmm - I always assumed this was down to the ignition advance - I'll have to have a play. We have a factory right-hander in at the moment which has a Renault engine in it, and has no idlespeed or lambda system, just the auxiliary air valve. All the electronics are there though Martin 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/