Right first of all,

Unplugging the cold start valve doesn't 'fig' any thing, it just covers a problem. If all your sensors were fine and the car was properly set up the cold start valve would do the job ford intended.

Second, do a search this has come up ALOT, look in my old posts, there is one there will a load of links (good ones) covering all the problems and fixes.

But for now:

Warm car up, then when warm disconnect the 2pin plug from the black box on the fuel distributor leave the car for 5mins or so and let us know if it starts then.

The car can be driven like this but don't give it any stick/boost.

Rob,