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Evap Purge Valve S90-V90 S90-V90

Mind bogging troudleshooting, two questions

I checked voltage coming to the vlave when running idle 6-7 Volts, should it be 12 Volts??

Also, when car starts and running idle there is no vacuum being pulled from the side of canister; however there is a steady vacuum from the the other side.
Sometimes vacuum starts flowing thru the valve. Does it have to pull vacuum thru the valve at all times or under certain condition???

please help

i replced valve with new one but nothing changed.






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