By passed the valve but once the car was at normal running temp I swapped it back over and there was no change so i doubt it is that aux air device. Found an HT lead earthing out so I have changed that. I removed the idle bolt from the throttle body and it's just a bolt with a flat end... ? Should this have a pointed end?

I have just checked all the pipes and hoses again and no leaks at all. Are there any other things I can check? The car idles smooth just a little quick...

That Fast tech article is brilliant by the way