On Sun, 27 Sep 2015 17:54:50 -0700 (PDT), wrote:

The cheatware detects when a motor undergoes emissions testing,
and
then

how is that possible?

As others have said by some physical anomally that wouldn't occur in
the real world or by the "brain" knowing what the testing profile is.
ie stationary at idle for 15 seconds, 1st gear to 10 mph in 4 second
2nd gear to 20 mph over 3 seconds, 3rd to 30 mph in 3 seconds, hold
for 30 secs, up to 40 in 5, up to 4th hold for etc ....

--
Cheers
Dave.