When it's cold, the engine tries to idle around 500rmp which is pretty low, and it struggles until it is warm. When its warm its sweet as, and sits around 700rpm.

When I change my vacuum hoses, the small rod moves forward, and the idle speed increases, and t runs better. However when its warm, the idle speed goes from 700rpm to 900 rpm (ish) Is this too much??

Currently the vacuum hose to the idle thing has no vacuum through it, so I suppose the small box with the vacuum hoses going into it need to be rearranged??

Can i move the screw to adjust the idle speed manually?
Any ideas??
Cheers
Nick