FAILING EMISSIONS

1991 Chevrolet Suburban

Tiny

sliane

December, 10, 2006 AT 9:34 AM

Dad's Suburabn will not pass Colorado emission test:
HC reading - 5.73 / Limit 4.00
CO reading 65.60 / Limit 25.00

Obvious CO way to high and running rich - he says there are no check engine lights for code triggers.

Any thoughts on what to investigate first?

FOUND 741 RELATED QUESTIONS

1 Answer

Tiny

82-454

December, 11, 2006 AT 8:36 PM

Put an oxygen sensor in it and tune it up. Maybe a catalytic converter. Ebay$50.

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