Originally Posted by
studabear
Visible tampering of the DPF=FAIL
DPF equipped vehicle emits any visible smoke during emission test=FAIL
Other emission control parts that are missing or tampered with etc like Nox sensor, EGR=FAIL
Correct...it all comes down to how its done and who maps it.
My DPF shell is still there and no visible signs of tampering= PASS
It was mapped by someone who knows what they are doing, not some wanabe mapper, who has the equipment but no idea how to use it,
I now have better performance, about 3mpg increase in fuel economy and zero smoke,=PASS
EGR is still there and intact so again no evidence of tampering = PASS
Car is so much nicer smoother and more responsive to drive best mod I have done.