2002 focus zx5

Howdy....this car stutters and misses only seems to do it when cold...100,000k it does have orig wires.. but why only when cold...

It misses out when it is cold because it takes a richer mixture to fire. When you aren't getting that richer mixture when it is cold it will cut out and miss. After it warms up it runs okay because a hot engine will fire a leaner mixture.