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Hey guys,

I have an '03 Excursion 7.3 Powerstroke and just replaced the fuel rail pump with an Airtex from Napa for like $150. The old female quick connect fitting on the inlet side of the rail pump disintegrated upon removal. The Airtex pump says on the box it has 2 male 5/16" quick connect fittings....and upon measuring with a micrometer they indeed measure 5/16" O.D. So I bought a replacement 5/16" quick connect female fitting that slides onto the male quick connect fitting, feels secure, but doesn't "click" into place....I feel it "seat" snugly but it can be pulled off with very little force....the female quick connect is definitely a 5/16" so why won't it click into place? Am I overlooking something obvious here? Thanks a lot
 
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