Very soon after I got my fiesta I noticed the very common over revving, but it has now started to "choke" as I hit hit the gas when it's cold. Is this the same cause as the over revving?

The problem are:

1. Revs creep at standstill up so I have to let out the clutch to bring them down.

2. When first starting, if I hit the accelerator it will cut the revs and try and stall.

3. On the motorway at about 3,500 rpm it will lose power/revs.

All these problems are intermittent.

Fiesta mk4 1997 1.2 Zetec.