1991 Ninety-eight oldsmobile sedan Car passed emission 25/25 test but fail two parts under 50/15 test co%1.68 allowed 0.63 fail. NQ ppm 891 allowed 853 failed. What is needed to pass emission?

Asked by Jul 28, 2015 at 08:05 PM about the 1991 Oldsmobile Ninety-Eight 4 Dr Regency Elite Sedan

Question type: Maintenance & Repair

1 Answer

You mean NO or NoX when you say NQ? That's the job of EGR. ....CO, carbon monoxide-- You might need a new catalytic convertor.

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