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Fuel filter trick

koda2000

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Today while installing a new 3-port fuel filter on my '01 ST I was having trouble getting one of the fittings to click into place. I sprayed a little WD40 onto the filter's barb and into the end of the connector. It then clicked into place with zero effort.

Does anyone know what the purpose of the extra line from the tank is supposed to do for you?
 






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