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
1990 Chevy truck failed ignition timing and vacuum line disconnected
by
Lance
Yes (1)
1991 volvo 780 turbo 2.3 L, nox emissions were really high other emissions were good
by
eric
Yes (1)
My 1987 Mazda RX-7 failed the smog test for high HC and NOx. Can it be a bad oxygen sensor?
by
Tim
Yes (1)
I have a 2001 Saturn Sc-1 with approx 77,000 miles. It has failed the smog test twice.
by
Stacey
Yes (1)
My Toyota Tacoma 1996 failed smoke check: high NOx
by
vuong
Yes (1)
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