Fiat Uno 1.0ie 93K 53000 miles
Have had the car for 5 years with no problems except when started the revs would not die down for an age. Have fitted a replacement stepper motor which has solved that problem but has shown that the engine is ticking over at
1000rpm instead of the 800rpm it should be. Which part is likely to be the problem, and can it be sorted without a visit to FIAT.