Cleaning IACV
 

I've been reading this guide to clean the IACV:

https://forums.nasioc.com/forums/sho...d.php?t=781242

Could I just use WD-40 or would I need carb cleaner etc as well?

That's a good write up.
By the sound of things petrol would work too.

The above link only does half a job, you want to dissasemble the unit to clean properly.
I first tried the above with no success...
Try this way
https://www.google.co.uk/url?sa=t&rc...MtX98PjDeuiaHQ

If you do split, make sure not to get too much cleaning fluid (petrol / carb cleaner ) etc in the bearing, for obvious reasons.
Also mark the position of the 2 screws holding the unit together. this isnt essential as can be adjusted when car is running.
Good time also to clean TB out and do coolant bypass mod.