In article <kfkn42tvaipokjplcnm1arlpqt85j3rehc@4ax.com>, vairox
<nothere@spammasters.com> wrote:

> On Sun, 23 Apr 2006 13:33:47 GMT, "Elle"
> <honda.lioness@nospam.earthlink.net> wrote:
>
> >You're correct: A 93 Civic LX does not have an EGR system,
> >according to my Chilton's.
> >
> >This seems like a helpful site:
> >http://www.aircare.ca/index.php?repinfo-glossary.php . See
> >especially
> >"Causes of Excess Emissions."
> >
> >It puts a lot of emphasis on an improperly functioning EGR
> >system causing
> >high NOx , but it lists a few other causes, too. None are
> >the PCV valve.
> >
> >http://www.interro.com/techgas.html#anchoreleven states
> >similar.
> >
> >An improperly functioning PCV valve may cause high CO, which
> >you don't have.
> >
> >What is a PCV valve "catch can"? Did you remove the PCV
> >valve?
> >
> >"vairox" <nothere@spammasters.com> wrote
> >> thanks guys... the O2 sensor was replaced by a shop the
> >> last time it
> >> failed (in july 04) and it failed with harder NOX and a
> >> higher amount
> >> of HC, though it was still in the legal limit....
> >>
> >> no ECU codes...
> >>
> >> might install a magnaflow direct fit replacement, if i can
> >> get them to
> >> confirm it is california smog/noise legal...
> >>
> >> sort of stumped cause i have another inspection coming up
> >> in june or
> >> july.... i am now using the proper OEM NGK plugs, did some
> >> intake
> >> cleaner throught the booster, idles much better, drives
> >> smoother...
> >> cleaned a lot of carbon off the pistons.
> >>
> >> you guys know what effect a PCV catch can would have on
> >> emissions? i
> >> know it wouldnt do squat on NOX, thats temp related....but
> >> any others?
> >>
> >>
> >
>
> thanks for checking the chiltons, i only have a haynes and it's not
> very specific about that... PCV catch can is just a can more or less,
> you take the hose that comes off the PCV valve and it connects to a
> can, then another hose goes from the other side of the can and goes
> back to where the PCV hose originally went, it just sits in-line of
> the PCV hose to catch all the oil blowby so it doesnt gum up the
> intake/valves etc... still allows the gasses to go by and get burned
> up...
>
> what are the other causes of high nox? high combustion chamber temps
> due to carbon buildup is one but im not sure of any others

I can only guess:
defective rings
defective muffler
defective cat. coverter
valves not adjusted correctly
timing set incorrectly
defective plugs or plugs not gapped correctly

If you hook the engine up to a computerized engine tester--it should
discover the source of the problem. I show a recent post where someone
replaced all of the parts of his engine that might have caused his engine
to stall on a regular basis. It makes more sense to use testing equipment
to discover the exact cause of a problem instead of replacing a bunch of
parts that are working great.
Jason

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