I bought one of these and never used it as car has been in bits since owning it
Lots of different reviews on what they do and what they don't .
Its not the normal resistor on the maf trick it plugs in to the diagnostics port set it up and go.
They do have their own big web site. plus youtube videos etc.
They cost about £120 but since i dont need it i thought i would offer it to anyone who was thinking of getting one for £50 including postage.(paypal)
For petrol engines only.
Message me if interested
All spares parts for 156 and 147 being sold that i will not be using (cheap) nothing too small ask what you want , willing to post world wide Phone 07922123242 Ask for Neil and say Mark said to phone .
Download link for Alfa 156's http://www.filedropper.com/alfaelearn