high fuel consumption 95 mk2 1.1cfi ford fiesta?

Hi,
The only way to accurately tell if a sensor is affecting your fuel consumption is to take it to a garage and get them to run a full diagnostic. What you can do is check tyre pressures, steering (tracking etc), and general engine condition. If you have a high mileage engine it could be in need of a rebore, also check that your clutch isn't slipping.
Cheers now

Ken Chapman
April 2007