Quote:
Originally Posted by Obrfso
So basically there r 2 things which differs euro spec to USA spec. first thing is because of USA regulation, the USA spec m3 has got a sensor which takes out the air from the tank. If u change the soft to European it will show a mistake because the sensor doesn't exsist in the European spec and after driving the pressure increases and the car might stop because of air in the filter, not petrol.. Secondly the cats are different and as a result the USA spec gives more fuel to injection... Another us regulation... I talked with the Guy from BMW motorsport department in Munich which only looks at m powers... Did someone know that?
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So if you've talked to a guy that works in the BMW M division why didn't you get him to answer your questions? He'd be able to tell you whether a US-spec car can be re-flashed to Euro specs and address your fuel consumption concern/issue. Now I'm really confused as to why you've created this thread.