Passing Emissions

[CSH-HQ]

While, in your case the fuel was fixed, in the real world, there is a 
summer/winter fuel, and the "Reed Vapor Pressures" do vary.  The name may 
have changed but it was the %'s of fuel content that evaporated at various 
temps.. Union 76 used to have some free hand outs that explained it better.
  I think DZ was talking about a registration typw test rather than 
federalization.
  Grumpy


>In my case with the high Nox with the Infinity QX4 that headers were tested
>with there really wasn't anything I could alter in the test procedure.  The
>test was done in a temp controlled dyno cell and atmospheric Nox and humidity
>are taken into the equation.  So I don't think it would make a differance if
>the test was done in winrer or spring.  The test fuel used is the same as
>used ny Infinity/Nissan for their vehicles.  I could use a "Fed" test fuel
>which has higher ppm of sulfur than say the "Calif." test fuel.  The high
>sulfur should help reduce Nox but trashes the CAT in this vehicle.  Nissan
>has had that problem for awhile because eastern states are now selling Calif.
>vehicles but selling fuel with a higher sulfur content and CAT warranties
>skyrocketed.  So my hands are pretty much tied. There more I dig into this I
>find out more skeletons rat holed in Infinity TSB's.
>
>CSH-HQ wrote:
>
>> Fresh oil change.
>> Use a oil/air seperator on PCV line, to min oil bypasiing to intake.
>> Low Octane, faster burn, less timing.
>> hotter operating temp.
>> Heated o2
>> Fresh ignition parts.
>> Measure terminal distances for rotor, and rotor lenght, and use the combo
>> with min air gap
>> If in doubt phase rotor
>> SBC, restrict waterpump bypass hole on pass side of water pump.
>> Completely heat soak engine, with long drive.
>> Higher than normal idle.
>> ETC
>> Bruce
>>
>> >I was re-reading the "too high NOx" post and wanted to start a thread
>> >on the subject of passing emissions.  The way my state works it, I
>> >had settled on the fact that I'll just have to be waivered (spend
>> >$150 to repair and it can fail and you can still drive). If I can
>> >pass thats great so I'll try. Here are the facts I've collected from
>> >readings:
>> >
>> >If your NOx is high:
>> >use more octane
>> >cooler air is better
>> >test in winter or spring.
>> >Disconnect Supercharger belts (if its the type that can be)
>> >
>> >So lets add some stuff. specifically what to do to ecm to help. on
>> >the buick list site there are links to "emissions" chips and there
>> >are also the stock chips available (bins). might be interesting to
>> >disesct them huh?
>> >~~~
>> >Dave Z. www.delanet.com/~tgp
>> >
>
>
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