hi, i have a 2001 peugoet 206 1.4 engine, when startin the car the idle usually heads up to around 2500 rpm, then comes down and sits at around 1100 rpm, on coming down it stutters at around the 2000 rpm, the car surprising drives well, apart from when stoping at a junction the idle moves at between 1500 rpm to around 2200 rpm, any ideas on this, has been to 2 seperate car garages who are out of ideas, so far have replaced all the fault codes which were lamba sensor, fuel injector number 4, and also the idle cont valve has been changed, and yet still the same. any ideas would be greatly appreciated thanks.