vairox <nothere@spammasters.com> wrote in
news:81cl429vgo5ejvaen1sd9dcegi3imdgaa1@4ax.com:

> i have a 93 civic lx (engine = D15B7) that was not manufactured with
> an EGR valve, which is weird to me cause i thought all modern
> vehicles had one (since the late 70's). I failed california smog 4
> times with twice the legal limits of NOX but everything else was fine,
> i'm assuming the catalytic converter is the only thing that fixes this
> right, as it is likely a 3-way cat?

maybe a bad O2 sensor? any codes set on the ECU?
>
> also does anyone know is using a PCV catch can (oil catch can) is smog
> legal in california? i know they are sticklers when it comes to
> anything emissions related, as most things need to have a CARB
> approved # stamped on them, but since the catch can only catches the
> oil and does not stop the air from recirculating and burning up as
> intended i dont see why it would be illegal, lowers emissions right?
>
> i know high nox is due to high combustion chamber temps, besides
> de-carbonizing the piston tops what else would lower nox on a non egr
> vehicle?
>



--
Jim Yanik
jyanik
at
kua.net