So it's raining and I don't want to ride bicycles or want to engage in the politics debate here -- so instead I've been analyzing the exact test result numbers in EPA filing that was issued October 27 2023 and then the CARB certification data that was approved on January 29 2024
Emissions Type | EPA Filing | CARB EO Filing | Max for CA LEV3 ULEV125 |
NMOG + NOx | 0.054 g/mi | 0.054 g/mi | 0.125 g/mi |
CO | 0.6 g/mi | 0.65 g/mi | 2.1 g/mi |
PM | 0.000 g/mi | 0.0003 g/mi | 0.003 g/mi |
I was initially worried about either some detuning of power or throttle response via tip in/tip out transient emissions but the numbers that the EPA approved the vehicle at and the numbers that CARB approved the vehicle at are exactly the same with the exception that some numbers are rounded and some are not. I don't see any evidence they had to make any sort of changes to the tuning in order to get emissions under control anywhere.
I'm thinking if there were changes to software they don't affect performance or emissions at all. Pretty sure all the worry and the rumor mill about updates being needed to pass emissions are all bullshit and it just takes time for the wheels of bureaucracy to turn.