Put another IACV on, still got the same issues...

I think the next step is to check the valve clearances again. Did a bit of googling and you get these problems if they are too tight..

How does everyone think we should do the valve clearances? We measured valve-rocker, as recommended by a few people, but when doing this the correct feeler didn't fit cam lobe-rocker. The manual for the car I have (Haynes I think) says do it cam lobe-rocker so I might try that this time. Too loose is better than too tight, for now.