I should imagine this being a problem for badly maintained cars, or cars with a "no smoke, no poke" type remap.
After a bit of thought about this over the weekend, I ran the ZT up to Lion Garage and had their tester Martin put it on their new gas analyser, and there was no issues with it at all, bearing in mind this is a car in tip top mechanical condition.
I then substituted the ECM in a hot swap for an ECM programmed with a Tom Force "MAFless" tune, same car, same operating conditions exactly if you bear in mind it takes me less than 30 seconds to exchange one ECM for another.
The result was a spectacular fail
It will be interesting to see how a lot of the cars fare in the coming months.
Brian