I've got a 1.6 8v Astra club - 2001...
i recently got the dreaded orange light on the dash telling me the engine needs inspecting.
One of my friends has the diagnostics thingymebob so we checked it out and it turns out my idle control valve was showing either "Not present" or "Not Activating".
The engine manegement isnt on constantly... when i first start the engine it is fine, but if i am waiting at traffic lights for example the car is idling high, at around 1200-1300rpm.
If its doing this for more than a minute or two, the light comes on and it starts to 'shudder' a bit tilli i start moving again - after which the light remains on for the rest of the journey.
I got hold of new idle control valve and fitted it today, but the problem persists even after the new valve has been fitted.
I have tried 2 new valves in total today and am now getting nowhere fast.
Can anyone give me any ideas or suggestions how i can resolve the problem or even what the problem might be??