Well the 'flying doctor' from Fiat UK came, recognised the fault, (yes the service manager called it a fault!) and they changed the ECU for, (I was told) the latest one with the latest software.
The change to the performance has been dramatic. I took the car to my usual test hills and it performed like a normal car. It moved off on the hill at my command, at the speed and revs I wanted and I can now stop the car on the hill by depressing the clutch and hold it with the clutch at the biting point and move away smoothly by lifting the clutch and increasing the revs - just like a normal car!
I know some of you will want details of the ECU (part number, serial number etc.) but it is raining and it's dark outside so please be patient I'll get them asap.
I'll keep on checking it in-case today was a fluke and they've changed my petrol for rocket fuel or something, but it seems OK so far.
I hope this brings a little light to this very dark episode with Fiat.![]()
This sounds very interesting....
Definitely a new ECU rather than a soft/firmware reflash?