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OBD II Not Ready for Emission Test

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25K views 21 replies 7 participants last post by  sheila  
Purge valve is normally closed. Simple test is to remove the vacuum line and replace with ~12" pc. of scrap vac. hose. You should not be able to blow/suck through the sampling hose. If you can, replace the valve as it has failed open. The vent valve, back under the fuel filler pipe, is normally open.