There is a pressure regulator on the exit end of the 13Brew

secondary rail.

The housing on the exit of the primary is just for the fuel line (on the
13brew). It could be the fuel temp thermosensor, which in the 13Brew is
mounted on the secondary rail.
My primary injector rail on a 13B has what appears to be a regulator at

the entry end. It has a plastic cover on it and when I took this cover off
out of queriosity, a screw fell out, put it back in put does the amount the
screw is tightned affect the fuel pressure (presuming this is a regulator)
or what is the screw for?
Wendell Voto

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