My wife's Fiesta 1.6 Ghia (54) is cutting out while driving. The water pump and thermostat housing were replaced at the garage along with the timing belt - unfortunately they got the timing slightly out and shortly after I collected it the engine management light came on - turned out to be a bent valve. The garage replaced the valve, had the head skimmed etc and rebuilt it all. When I collected it the second time, I thought it was ever so slightly lumpy on idle but aside from that drove fine and the engine feels strong.

Any idea what is wrong with it - it may be old but its in great condition and a shame to get rid of it, on the other hand it's too old to spend too much on exploratory work (idle control valve is apparently a £300 part from Ford and no guarantee that it will fix it).