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1984 Fiero failed Aircare |
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InfernoFiero ![]() Senior Member ![]() Joined: 25 June 2011 Location: Canada Status: Offline Points: 133 |
![]() ![]() ![]() ![]() Posted: 09 May 2013 at 2:52pm |
Hello,
I took my Fiero to the Aircare center today, and it passed all tests confidently but one: Oxides of Nitrogen (NOx) ppm. The maximum allowable is 2438 and my reading came to be 2714 -- the average passing reading is 712.50. The only thing I did before the Aircare test was I filled up on some Shell gas -- like 5 minutes before -- I always fill it up with Chevron but today was different since I had a quarter tank of gas. I asked around and learned that the major culprit here may be the Catalytic Converter, but I wanted to gather your opinions and guesses on what the problem may be! Thank you! |
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Rob N. ![]() Senior Member ![]() ![]() Joined: 02 March 2008 Location: Canada Status: Offline Points: 138 |
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Try changeing the O2 sensor... fixed my 4 cyl & 6 cyl
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Colby ![]() Admin Group ![]() ![]() Joined: 30 March 2009 Location: Abbotsford/Sask Status: Offline Points: 666 |
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A malfunctioning EGR valve can cause a higher NOx reading.
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88 Formula 5 speed
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beken ![]() Admin Group ![]() ![]() Joined: 12 February 2007 Location: Canada Status: Offline Points: 1464 |
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It wouldn't be the catalytic converter. My car has never failed on NOx. I'm pretty sure the cat isn't working on my car.
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![]() Beken (aka Ken) - bekentech@westcoastfieros.com Original and still the owner of an 85SE 2M6 4spd |
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Patrick ![]() Newbie ![]() Joined: 19 April 2008 Location: Vancouver Status: Offline Points: 6 |
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Check your ignition timing. Perhaps it's too far advanced.
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