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polution control
Posted: Wed Aug 09, 2006 9:39 pm
by ws90gtz
I have a 1990 gtz that will not pass smog. nox way too high, due to high combustion temp. egr takes care of this, but the 2.3l engine has no egr. any body know how the nox is controlled on this engine ?
PLEASE HELP !
no smog no gtz
THANKS
polution control
Posted: Wed Aug 09, 2006 10:32 pm
by rweatherford
Which fuel are you running. The Quad does not need an EGR to pass. Some will almost pass with no converter in good running conditions.
polution control
Posted: Wed Aug 09, 2006 11:01 pm
by 1988GTU
Don't run E85 and burn +92 unleaded fuel (92 to 94 works) octane. Then retest.
polution control
Posted: Thu Aug 10, 2006 8:24 am
by rweatherford
(1988GTU @ Aug. 09 2006,22:01)Q
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EDon't run E85 and burn +92 unleaded fuel (92 to 94 works) octane.  Then retest.
I'm curious why you say that because all of those fuels would burn cooler than regular?
I must be missing something.
polution control
Posted: Thu Aug 10, 2006 10:22 am
by Guest
Mine failed because of a bad injector. It made one cylinder run lean.
polution control
Posted: Thu Aug 10, 2006 7:28 pm
by 1988GTU
It's recommended to run premo fuel for a H.O.
Plus it should use less fuel using +91 octane.
polution control
Posted: Sat Aug 12, 2006 10:28 am
by rweatherford
91 octane is the recommended fuel, but I didn't understand why not to try the other fuels. They are likely oxygenated by ethanol.
I don't think the factory computer can compensate near enough for E-85, so I wouldn't bother.