I used to have a Lotus Esprit turbo (dual dellorto 45), I always a hard time passing to the emission. The hydrocarbon always high. So, I always retard the timing and let one
vacuum hose unplug. It runs zhyte going to the emission but I always pass it.
I also had a set of jets that I put every 2 years I go for emission. I hate it & I sold it!
Two of my cars are in Florida and no emission. New England is tough.