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Everything that I can find shows the Tercel having a standard Toyota EFI system that has a manifold referenced fuel pressure regulator with a return line. In the post above, you can see the return line and manifold pressure line. On the hidden side, as a part of the flange, is an o ring connection to the fuel rail.
In my >30 years of owning and working on Toyotas, I have never seen or heard of a mechanical in-tank fuel pump.
Simon
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