With my Volvo V70I (Bj. 99, Mj. 2000, switch) the speed of the course is sometimes more, sometimes little and then catches again, which for example can become a bit rough when parking. When driving and switching up on the slope it is less noticeable. I already used the search function and came across the following causers. – Clutch pedal sensor – Impulse encoder camshaft – throttle valve dirty When searching I am on a post of “Excysyr” bagging idle rundre The clutch pedal sensor 9472979 is original for approx. 120 Euro and TRISCAN for approx. 40 Euro. It is possible to take the much cheaper one of TRISCAN with this component or to better install the original one With the clutch pedal sensor, according to my research, the error is due to the installed resistance. Even with new parts, the resistance value should vary greatly … therefore question whether scho If you have experienced the cheaper part of TRISCAN, it is normal to suck off the idle speed when the engine is warm, if the engine is cold, up to about 1.5 km of driving distance. If you pedal the clutch pedal in the stationary gas, it does not affect the speed. If you give gas in the stationary gas, you save the speed to approx. 400 rpm and catch yourself shortly afterwards at 900 rpm. Thanks for Tiips