My Nissan note E11 1.6 petrol from 2010 developed a strange idle problem. Cold or cool engine fine. Heating up in city traffic idle suddenly drops and I am nearly vibrated out of the car. Tried to relearn her procedure with 2 different dealers. Problem increased even after spark plugs changed and throttle valve cleaned. If you learn her another 50 rpm additional, this is possible, other problems arrive because engine tries to adjust continuous to a situation it does not want to be in and I have to use the brakes additionally too much slowing down when releasing gas pedal. This is why I hate modern cars. Nobody can detects problems and want you to spend you thousands of pounds in senseless troubleshooting exchanging unnecessary parts not being the cause. Quite desperate for somebody recognizing the error/problem. Two official authorized Nissan dealers not capable tracing it. When cold in garage problem not there after 10 minute running vibrating on too low idle. If anybody has seen this problem, please help. Regards.