right,
my car idles fine but when i try to accelerate normally my cinq jumps and then goes off normally. if i put more revs down she'll go off smoother. there seems to be a flat spot between 3000 and 4000rpm, and at some speeds when i go to accelerate it feels like the car is being held back and then let go. i've been told it could be the lambda sensor. ne ideas?also, how much does a lambda sensor cost, fiat said £85 [!]

It depends. can get non-gen but out of experence genuine ones are usually best. It does sound like a lambda problem. Sometimes they just get coked up. Give it a good trashing down motorway and see what happens.

Hi,

the flat spot between 3-4000 is normal

The hesitation might be the lambda or the sparks, spark plugs (happened to me) or .....