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International Automotive Technicians Network
Re: 2012 Ford Focus 2.0 DOHC non Flex Fuel P0171
Posted to Technical Discussion Forum on 8/28/2015

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Purge will only add more fuel when canister is full of fuel/fumes, after they have all been "purged" it will only be sucking air.

Is this what you are referring to as opposite?

[2012 Ford Focus S... Login to read more.

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