its a supercharged fiesta st it was idleing at 1.1k an when you change gears or stop it would hold up the revs for a second then drop.
now its holding at 1.8k-2k all the time making it undriveable.
i cleaned out the throttle body an no luck so i used a small amount of sealer around gasket incase it was sucking in air an still the same
ive disconnected the battery to try an reset it an that didnt work either!
its my only car now an need it to be right!
any help will be appreciated thanks