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Author
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Topic: Smog test question.
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SVTMike
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Member # 2345
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posted
 
 
Yold my car to get smogged today and during the 15mph test it failed the NO test but ok at 25mph. What could be a reason for having so high NO count? could it be the o2 sensor?
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1985 1/2 Mustang SVO
2003 SVT Focus
Posts: 766 | From: San Leandro | Registered: Jan 2003
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Jdub07
( O Y O )
Member # 2728
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posted
you mean the no2 test? maybe I'm wrong but it could be egr valve, or yes o2 sensors...correct me if I'm wrong but wouldn't clogged or bad 'cats' cause that too?
[ July 21, 2004, 08:47 AM: Message edited by: Jdub07 ]
Posts: 7282 | Registered: Apr 2003
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Wolf
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Member # 1723
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posted
Have you tried that "Guaranteed to Pass" gas stuff yet? I used it before every test, and my SVO always passed. Don't know if it did anything, but it's worth a shot.
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64 Mercury Comet - 289ci
99 Honda Superhawk - 996cc V-Twin
Posts: 122 | From: Milpitas, CA | Registered: Aug 2002
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92stangLX
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Member # 3252
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posted
How bad did it fail? Is you check engine light on? If it is then start by troubleshooting that. My 92' failed the first time and then passed when I changed the EGR.
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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SVTMike
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Member # 2345
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posted
No check engine light. I passed with flying colors on everything except the NOX at 15mph. I am gonna try the garauntee to pass and change my O2 sensor, i hope that works.
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1985 1/2 Mustang SVO
2003 SVT Focus
Posts: 766 | From: San Leandro | Registered: Jan 2003
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Fostang
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Member # 3752
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posted
I thought nox was the egr?
Someone correct me if I'm wrong.
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67' Fastback TT 408
67' Camaro Lsx
64' Corvette Fuelie
57' Chevy Bel Air Lsx
68’ Pony Convertible
66’ Pony Coupe
Posts: 3011 | From: Stockton/Danville | Registered: Nov 2003
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