[Shotimes] Fwd: damn cali emmissions!@!

[Marc Randolph]

I remember going to NJ emissions with my 80 Cutlass timing retarded XX
degrees and barely making up the mountain on old Route 10 in Randolph.
Thanks for the memory. I loved that car.

Doesn't lowering compression also reduce exhaust temps? If you're at 120K,
try a decarbon procedure and that may solve your problem.
Marc/GA
'93 MTX @105K

----- Original Message ----- 
From: "Kevin & Cheryl Airth" <clubairth@peoplepc.com>
To: <goldenstateshoclub@yahoo.com>; "shotimes" <shotimes@autox.team.net>
Sent: Tuesday, September 30, 2003 11:42 AM
Subject: Re: [Shotimes] Fwd: damn cali emmissions!@!


> Jon:
>  A couple of things. The catalytic converters in the SHO are TWC's (Three
> Way Catalytic Converter). This means that the converter reduces HC, CO and
> NOX.  NOX is almost exclusively produced at high combustion temperatures.
To
> reduce the combustion temperature and the NOX is the only reason for the
EGR
> system. The EGR works but putting exhaust gases back into the intake
> manifold at certain times. This dilutes the fuel/ air mixture coming into
> the engine and reduces combustion chamber temperatures. As you know the 49
> state MTX cars did not have EGR installed. But all the ATX cars and the
> California MTX cars came equipped with factory EGR.
>
>  So for your car. What exactly did they put on for converters? New correct
> 3-way converters are what's needed. Did they by chance use 2 way
converters?
> They are cheaper. When asking you want to hear the converter is a
> reduction/oxidation catalyst or 3-way.
>
>  Make sure the car is good and hot but does not idle very long before
> reading the tailpipe emissions. Run the engine at 2500 rpm for 30 seconds
or
> so and then let it idle then read the tail pipe.
>
>  Make sure no codes are present in the computer (PCM).
>
>  Finally pull the spout right before the test. The SPOUT (Spark Output)
plug
> should be on the passenger side of the engine around the cam sensor. It is
a
> removable plug with a gray color. It will be buried and dirty so spend
some
> time looking for the gray piece. Push the side tabs in to release the
plug.
> Should be enough slack in the harness to pull it out but it's close. DO
NOT
> get rough with the wires in this area! When removed this forces the engine
> to base timing and is much retarded from the computer advance. Remember
that
> retarding the timing will lower the combustion temperature also but really
> kills the power output. The car should be a real dog with this pulled!
Back
> firing when trying to accelerate. I would do it while at the test station.
>
> I found the proper 94 MTX converters for $290 here:
> http://www.catalyticonverters.com/FOTAURUSSHO45259295.html
>
> Or my favorite place is $285.
> http://www.discountconverter.com/converters/display_table.cfm
>
> With your low HC and CO level I am suspicious of the converters that were
> installed. The NOX is taken care of in one section of the converter but
the
> HC and CO are handled by a different section. So if both HC and CO are
good
> and low I think the converter is doing it's job. That the NOX is so far
out
> of range, I wonder if  it's being treated at all?
> Please post your all your numbers. This can add more details to your
> problem.
> .
> .
> .
>
>  Subject: damn cali emmissions!@!
> > > this is my post from the sho forums, if any one has
> > > advice please let me know...
> > >
> > >  thanks
> > >         jon
> > >
> > >
> > > i need to reduce my nox in the exhaust. here is my
> > > story, and yes i have used the search and did not get
> > > an answer to my question in specific.
> > >
> > > all i need to do is drop my nox levels, all the other
> > > levels are very good and with in spec, on the low
> > > side. i have a 49 state car, 94mtx with 131k miles. i
> > > recently did the 120k (valves, plugs, wires, tstat, o2
> > > sensors, cleaned the intake) within 10k. the nox
> > > levels by the way are about twice as high as the
> > > allowable level. i failed the test and then replaced
> > > the cats $$$!! and the same result. the car passed at
> > > the same shop about 2 years ago with no problem,
> > > everything, if i remember correctly, was well with in
> > > the standard. i will pull the codes off of it later
> > > tonight or tomorrow. the car is in california, but all
> > > i need is a sniffer test, as the car is registered out
> > > of state and i am in the coast guard and only need to
> > > get a sticker to drive on base, so the military made
> > > the deal with california to get all the military cars
> > > smoged in order to get the sticker. i have fought that
> > > ever since i have been here!! oh well its over my
> > > head. ok back to the sho problem... i run 91octance,
> > > im not sure if it is oxengated or not?? would that
> > > even make a difference in the nox content?? i do know
> > > a place that sells non oxegentated fuel, well their
> > > sign says so!! any help would be appreciated.
> > >
> > > thanks
> > > jon
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