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Author Topic: High Nox readings.....Failed Smog yet again. Help!  (Read 2311 times)

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Re: High Nox readings.....Failed Smog yet again. Help!
« on: May 25, 2012, 07:26:51 PM »
Quote from: Snowtoy on May 19, 2012, 02:05:48 PM
With a new CA cat on it already, you might try pulling and cleaning the EGR valve and checking the air injection valve(if it is a CA smog equipped vehicle).  On an '86 I restored about 5yrs ago the Air injection valve was bad causing high NOX, fortunately I had a spare, new ones run about $300.



check egr and port
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