misfiring mk2 8v (when cold)

[zakman]

When it is cold the no 3 cylinder has low compression but when it warms up (to about 70 degrees C oil temp) the compression comes back and it runs like a dream. 

Have checked for sticking valves or tappets and done all the usual checks on the leads, spark plugs etc and nothing seems to have cured it.

Any ideas?

[Neaty]

might be an idea to post that in the garage or mark 2 sectoin mate