hi wendy
im Surprised no ones offered any help , but our A2s are fly by wire , there is no throttle cable just a pedal that turns some kind of electronic sensor , maybe if you can explain further i may be able to help, ive even got a spare pedal assembly complete somewhere if it does turn out to be faulty thow unsure if theres any difference between a petrol one and diesel as my spare is. how much travel of pushing the pedal before the revs pick up , and once revs pick up does further travel downwards on the pedal increase the revs , like for like as such as may be the case your not use to a fly by wire throttle as feels totally different to a cable set up.
- gary