i have 1991 model 190e 2.0, the idle speed increases by itself once the car is running at normal temp it seems to be taking in excess air and the system is pumping in more fuel to compensate
i have recently discovered a small valve on the inlet manifold just behind the air flow sensor which is sucking air and causing the problem (i think) does anyone know what this is and if there should b anything coming off this valve????if so please help urgent !!!