After replacing the ICV with a genuine Magneti one from ECP my idle issues are still present (very occasional stalling, revs bounce up and down slightly). Tomorrow if the weather is dry i'm going to check for air leaks but also want to check that the supply voltage to the ICV is what it should be. My theory is that if it lower than it should be the valve will be slow to react?
I'm guessing you need to test one of the pins vs earth but which one? There's no mention of it in the sensor testing FAQ. Can I just try them all? Complete electrics noob so no idea if this could potentially short something so wanted to check first.