On fuel injected vehicles the
oxygen sensor senses the extra vapor and signals the computer to shut
down the liquid gas passing through the injector(s).

That's only
half of it
We told you this vapor was injected into the
intake manifold. To be more specific, we install the Fuel Atomizer
2000 in the PCV line . The hydro-carbons and emissions
that normally pass through the PCV valve to be re-burned are
collected in the sludge chamber of the Fuel Atomizer 2000.
Some members found this to help them pass the emissions test
whereas otherwise they would not.