Regular Smog Check
STAR Smog Station
Smog Check Repair
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Smog Check & Emissions Questions and Answers
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High NO
Question
Answered
1986 Ford F-150 failed smog test for high NO. What causes high NOx on my Ford?
by
Daryl
Yes (1)
1982 Cadillac Seville 4.1HT fuel injected
by
josh
Yes (1)
1994 GMC Sonoma high HC, above 2000 ppm.
by
chex
Yes (1)
2003 Chevy Cavalier - Check Engine Light On
by
William
Yes (1)
1993 Ford Ranger failing NO(PPM) at 15mph only.
by
Mike
Yes (1)
1987 Toyota Cressida 160,000 miles failed high NO at 4000 ppm. Why?
by
Mo
Yes (1)
1994 Ford Ranger Engine Carbon Build Up.
by
Robert
Yes (2)
1991 Volvo 740 station wagon failed the enhanced smog test for high NO. What do I do?
by
Robin
Yes (1)
1991 Chevy S10 failed smog check at idle but not at high rpms.
by
JON
Yes (1)
1998 Toyota Camry, 2.2L 4cyl automatic, failed high CO. Does it need an Oxygen Sensor?
by
Joey Michael
Yes (1)
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