This is topic Smog test question. in forum Tech Talk at Northern California Ford Owners .
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Posted by SVOMIKE (Member # 2345) on
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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?
Posted by Jdub07 (Member # 2728) on
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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 ]
Posted by Wolf (Member # 1723) on
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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.
Posted by 92stangLX (Member # 3252) on
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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.
Posted by SVOMIKE (Member # 2345) on
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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.
Posted by Fostang (Member # 3752) on
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I thought nox was the egr?
Someone correct me if I'm wrong.
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