Our cars run with electronic throttle control.
I have noticed a few funny things with it, as i guess the technology isnt completely perfected yet.
when the car is idling and you press the accelerator it takes a fraction of a second to realise the pedal has moved. same goes when taking foot off the accelerator sometimes.
Its just the way it is.
what i find helps is going to ford and getting an ecu reflash with the latest software.
If you guys want to chat with more fiesta owners take a trip to www.fordforums.com.au
or eurofordclub.com and click on the fiesta formus.
Also an even bigger fiesta forum is ukfiestanetwork.com