1996 Cadillac STS failed emissions test for high HC

Hello. Our 1996 Cadi STS V8 failed HC during 15 mph with a meas of 59. The max allowed was 47 and avg was 9. What needs to be replaced/repaired to meet the passing range?


Answer:		The best explanation of why your Cadillac STS may be emitting high HC can be found at the link below. What Causes High HC No particular emission component can be suggested for repair(s) without a diagnosis of your Cadillac's entire emission system, specifically Fuel Feedback. posted by SmogTips Support

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