High revs when idle, no one can figure out the problem :(
Ford Focus 1.6 gas 2001.
I've had this problem for 2 years now, every winter it's the same thing, whenever the car is running and i press the clutch, the revs go up to 2000 and stay there until the car comes to a complete halt, at which point, it drops down to normal 1000.
Oh, but it gets better, if the engine is warm enough and i turn off the engine and then turn it back on, the revs go up to 3000. It's awful.
I've been to 3 car services, one of them being a Ford house. They all say it's because of the idle air control valve (IACV) or throttle position sensor (TPS).
I've already changed 3 TPS's and 4 IACV's all of them original Ford parts and although the problem WAS fixed, it always came back after 2-3 weeks.
The guys at the Ford told me they don't know what else to do, can you believe that ?
Tests show nothing, i don't know what else to do... it just seems unreal.