I'm getting a new focus st in March Gary do colins do a free reset in the first year like bluefin do or is it 150 pound reset
Another thing from the mk2 that probably affects other marks with similar effects is uneven tyre wear. If the difference between your newest/greatest tread depth tyre to the most worn is sufficient it will trigger the ECU to believe there is a fault.On the Mk3's especially if the rear wheels are not being driven at the same speed as the front wheels then the car thinks it has a problem & very quickly switches to limp home mode & reduces power as I found out myself a while ago! On the mk4 it is even worse as if the various sensors don't detect movement as well the car can think it has had a crash & cut everything off!
In short RR'ing a Mk2 can just give an ESP fault if the rear wheels are not spinning but Ford seem to have made the system even more 'clever' in later models................................😡