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failed emissions- nox levels are too high. How do I lower combustion chamber temps?

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Old Jan 1, 2002 | 11:21 AM
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Default failed emissions- nox levels are too high. How do I lower combustion chamber temps?

I run 12:5 compression. 12 degrees timing. I have a remapped chip from locashracing in phoenix. Im half the limit on hcl and 1/4 the limit on co. I NEED to lower combustion temps. Right now my cam gears are set at 3 degrees advance exhaust, 2 advance intake.

ANY TIPS ARE WELCOME

-sam
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Old Jan 1, 2002 | 11:29 AM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (97lstegra)

With compression that high you might be kinda stuck. Compression equalls heat.

Anyway, you might try adjusting the gears alittle for more over-lap. This will act as artificial egr.HTH.
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Old Jan 1, 2002 | 11:31 AM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (vagoITR)

how
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Old Jan 1, 2002 | 11:38 AM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (97lstegra)

retard the exh cam and add more fuel. that should help somewhat.
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Old Jan 1, 2002 | 11:56 AM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (sgT)

how much?
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Old Jan 1, 2002 | 11:59 AM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (97lstegra)

U might wanna try to put a big *** fan in the front while running it....it works for me. Disconnect fuel pressure regulator CO and HC might change but might do some good for the nox
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Old Jan 1, 2002 | 12:04 PM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (ITR1150)

disconnect fpr? what?

-sam
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Old Jan 1, 2002 | 12:05 PM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (97lstegra)

Go to whoever built your motor for help.
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Old Jan 1, 2002 | 12:06 PM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (sgT)

why would i disconnect my fpr? Im confused...
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Old Jan 1, 2002 | 12:08 PM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (97lstegra)

because disconnecting the fpr makes it run rich.

try what i said, retard the exh cam and increase your fuel pressure.
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Old Jan 1, 2002 | 12:12 PM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (sgT)

to what psi? i have an adjustable fpr.

-sam
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Old Jan 1, 2002 | 12:21 PM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (97lstegra)

First make sure if you have an AFC that its all 0.
increase it the pressure like 5psi.
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Old Jan 1, 2002 | 12:31 PM
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Default Re: failed emissions- nox levels are too high. How do I lower combustion chamber temps? (sgT)

k
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