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Smog Check & Emissions Questions and Answers

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  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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