The R25 system does not hunt, yet has the same idlespeed system. The Renault manual for setting up a lambda-equipped system with idlespeed system like the D's describes setting the screws, and should result in a smooth idle. Bottom line: The engine should NOT hunt when set up properly. Quote: It appears that DMC didn't want unskilled people messing with the settings but Renault had no proplems with giving the dealers the info to set them up. To set the idle you clamp off the pipe to the idle valve and set it with the brass screws as per engines without idle system,ie remove and clean the screws,refit them and screw them all the way in.Back off the two front ones 2 turns and the set the idle with the back screw to 900 rpm. Martin dherv10@xxxx wrote: > Martin, Is it possible to shorten the loooong post, I know why and what makes the fuel system hunt or seek, but I can't pull out of the email what you want. > John Hervey > www.specialTauto.com