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International Automotive Technicians Network
Re: Failed Smog Test
Posted to Technical Discussion Forum on 3/5/2020 3 Replies

Your O2 is high at idle(1.6%) and good at cruise. Your HC is very high at idle with decent CO. The chances of a over rich condition are none. Either a lean condition, vacuum leak causing a misfire or a mechanical condition. Perform a compression test or a rela... Login to read more.

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