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I'm working on a '93 940 with Regina fuel system. The owner replaced the fuel pump and reported that he drove around the block and then it died and wouldn't restart.
I checked the fuel pressure at the test point just before the filter and there is 0 PSI. I pulled the pump and it runs when energized, and everything looks OK. I'm sort of at a loss as to why there isn't any fuel getting out of the tank. I'm curious as to what the piece that goes between pump and the sender hose...see photo below. It appears to be some sort of regulator that has o-rings in it.
I'm really at a loss as to what the true problem is as I've never worked on a Regina car, but suspect that something may be wrong with the way that this piece was installed.
Any ideas?

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