Gone through all the intake stage by stage, all sound.
Looked at all the old logs again from FIATECUSCAN, and checked for codes yet again.
My consensus now is there is nothing wrong with the car, talking it through with a mechanic friend my view is until I get errors or feel the car is not 100% I will stop chasing this.
Up shot is I have re-plumbed the BMC Air intake so it now gets some benefit from the air standard intake. And I know every part of the intake system is sound.
And I now have the ECU in my hands and am seriously thinking about sending it off to Alfa Tuner 'Gus' for a remap. Its so dangerous playing with Alfa's on saturday morning
The theory on the remap is it probably needs it as I have bolted on most of the standard toys now and I should remap to make best use..
I have BMC CAI, a larger 76mm throttle body, Decat, Larini exhaust.
Any views on alternative remaps in essex, I would prefer to use a local tuner but Alfatuner's good reputation is hard to ignore.