Thanks to James, you were spot on. I moved the piston on each valve and the new one is alot looser than my current one, so obviously the wrong spring rating has been used, so beware other potential buyers!

I can simulate the same effect on the old valve by swapping the two springs around but then the valve dosen't close properly, so they coulden't have made that mistake!

I took my old one apart and done what you said with the spring and the car idled perfect this morning (It used to hunt)

However I went to start the car tonight and the same old problem was back again

I think I will get a refund and jusy try to find another VAE01.

Thanks to others who replied as well.

Martin