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Originally Posted by jadcock
So even after you filled the tank plumb full, it still sputters on steep hills?
Other thing I would think of is a fuel pressure regulator, but that's usually not incline-dependent. Excepting the pump, there's really nothing to go wrong with the fuel system, especially not something that only happens on inclines. My money is still on the tank/pump/sock.
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Do you know how the in-tank fuel pump in constructed? I once had a '75 Toyote P/U that developed a problem that turned out to be a filter attached to the pump. It had a sponge-like affair inside of a "mesh" bag to keep the bag from sucking flat. Over the years the sponge thing turned onto what looked like coffee grounds and would temporarily block the filter intake. Does the Nissan pump have something like that???