[DML] Re: Fails CALIF emission

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

Among the simpler things to check if the NOx is high is the following:
Timing: base, mechanical advance, and vacuum advance
Temperature: slipping belt, corroded impeller, stuck thermostat, bad
otterstadt, blocked radiator (air side AND coolant side) mineral
deposits in motor affecting heat transfer, air pockets.
Excessive carbon build-up in the combustion chamber.

High NOx is caused by high combustion temperatures (pressures) so
anything that would cause the combustion temperature (pressure) to
increase is a possability. A catalytic converter by itself does not
change NOx unless it is plugged up. In that case it causes increased
back-pressure raising the combustion temperture (pressure). A simple
test can confirm. A symptom of a plugged Cat is a drop-off in power on
acceleration or a glowing Cat. I am sure Gregg can offer much more
expert advice on the subject of emmision control but this is what I offer.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "stephenjpattison" <steve@xxxx> wrote:
> 
> 
> My car seems to frequently fail the Nitrous Oxide test on the 
> California Emmisions Inspection.  I have 31k miles and recently had 
> the O2 sensor replaced in Garden Grove.  Outside of the repair shop, 
> does anyone have any ideas what I might look at ?  Levels today were 
> 2 to 3 times maximum allowable.
> Thanks








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