Ok, so not the EGR
These are the opacity reads and where it failed. Needs to be below 0.7
4.6
1.98
1.75
1.71
3.37
3.24
Today they retested but pulled it as it failed and they didnt want me to pay for a new test:
1.34
1.35
1.39
So you can see things have improved, but not enough.
I wonder...