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High CO
Smog Check & Emissions Questions and Answers
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Question
Answered
1991 Pontiac Firebird High Emissions HC CO and NO
by
Jeff
Yes (1)
1981 Toyota Pickup Failed Smog Check For High HC and CO
by
Steve
Yes (1)
Why did my 1987 Buick Regal Fail for High NOx?
by
Robert
Yes (1)
How to Decarbonize a 1992 Toyota Corolla Engine and Reduce NOx.
by
horace
Yes (1)
Honda Civic high NO readings
by
david
Yes (1)
Cadillac Deville Failed Smog For High HC
by
Regina
Yes (1)
1997 Honda Civic Failed Smog Inspection Due to High NOx
by
alberto
Yes (1)
1979 Chevy C10 Pickup Carburetor Runs Lean
by
Christian
Yes (1)
1996 Chevy Cavalier Failing for High NO
by
Angela
Yes (1)
2007 Nissan Sentra Failed HC and CO
by
Jon
Yes (1)
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