I've had an engine warning light on for a while and my car always seems to be fine when the mechanic looks at it.

From looking through the forums here and online it might be an issues with the Idle Control Valve, the only thing is I don't know where to find it and can't find anything specific on google or youtube that would show me. Lots of posts here in the past but the image links have expired.

My car would often stall when stopped at lights, or coasting. Usually there is a bit of warning as the rev needle basically bounces about when the car is stopped before a stall.

Does anyone know of a detailed engine image online or anything that points out where I should find it? I want to try cleaning the valve to see if that works.

EDIT: I should have put this in the technical forum but it won't give me permission to delete this.
Also an image of my engine is below... seen videos on other fiesta engines and focus's that the valve seems easily visible but can't find it in mine.