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Awesome article. Replaced the pump, still have a leak-down issue after sitting causing long crank starts. Does that pressure line from the brown connector go directly to the injector rail? Does the pump draw from the filter or push through it? I see two lines in the bottom of the filter housing. What are they? I see three lines under the car; pressure, vent and? I thought it was a non-return system. I need to back track to check for leaks. Can I put less than 52 PSI air to the fuel line under the hood and check for leaks? I assume the check valve can handle that?
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