Hello, I am owner of Ford Focus 1.6 74kw 2001. for almost a year. First I had problem in front of traffic light or stop when shift out from gear to "neutral", RPM drop down to 500 and back to 800. My mechanic clean out throttle body and then my real problem start. After that when engine is cold, and i start car, its working perfect and I can drive 10-20 km everything is fine but if I turn off car and turn on after 10 min or 10 sec rpm is on 950 and when I shift out from gear or changing gear, rpm is on 1500 or 1900. If I shift out from gear in front of traffic light my rpm will stay on 1500 and when car stop rpm will drop down to 950 after 3-5 sec. IACV is cleaned, TPS is cleaned, mechanic did some initialization and now I am driving it but problem is still there. I changed five mechanics. I noticed one thing, when I turn off VSS sensor car is working perfect all time.....I would like to be turned off but problem is my speedometer not working than Please help...