The connector is for the Lambda, not the K Jet. The K Jet is purely a mechanical system. You simply had your O2 sensor and freq valve inoperative. Not exactly good for emissons nor the best way to insure continued health of your cat converter. The car should not hunt during idle. It takes a working knowledge of the Lambda ECU's operation, proper mixture and CIS setup, and a reasonably healthy engine to make the PRV idle well from a cold start. Most people ignore the extra enrichment provided by the cold temp switch and that's often what frustrates them in setting up a stable idle. If the idle speed system is working an erratic idle (before O2 sensor warm up) is almost always associated with this cold enrichment. If you instrumented the Lambda ECU and exhaust stream you'd see the correlation. This is why the car ran "better" without it connected, because a dead Lambda ECU will not drive the frequency valve. Cold start enrichment is then left solely to control pressure. If the idle hunts after O2 sensor warm up there are other paths to follow but in your case it sounds as if the hunting is due to the (now active) cold enrichment switch. It toggles the same input as the WOT switch. Contact me off list for procedures that are guareented to cure any idle problems (from any cause) you may have. You'll need some basic tools and the ability to follow directions. A dwell meter would also be helpful. Btw, I'd have thought after owing the car for a year you'd have already looked at all this. You'd also be unlikely to pass emission testing. The connector is such that it shouldn't simply come off. The blue wire is likely the O2 sensor while the "test" wire sounds like it was added by a PO. It could be connected to any of the ECU inputs/outputs or even the O2 sensor itself. --- In dmcnews@xxxxxxxxxxxxxxx, "Mads de Bruin" <debruin@xxxx> wrote: > Hi, > > This weekend a friend of mine helped me out with removing a very annoying talking alarm that wasn't working the way it should. While > I was preparing for that task by removing the center console, I also took a look in the compartment behind the drivers seat......< 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/