Fiat Cinquecento sporting R reg not used for 9 mouth when cold will rev to
> 4500 but when the temp gauge goes up it will not go above 2250 revs
> it seems to be misfire as well.I Have remove the rear exhaust box and
> renew the cat/spark plugs/fuel and air filter but still the same. > can anyone help
>
Try lamba sensor or airflow meter. I don't have a cinq, so I'm guessing, but these are the cause of similar problems on many cars.