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I had my WUR rebuilt several years by 928 Classics. ?Recently, it has been giving me fits starting when cold.

Pressure testing showed the cold control pressure was over 30 psi. ?When rebuilt, the screw/locknut mod was done. ?No amount of adjustment would bring the cold pressure down.

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Yanked it and disassembled it. ?Everything looks fine inside. ?Tested the warm up strip. ?It works.

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If I connect it back to the fuel lines on the car with the bottom 2 halves off (ie no spring pressure), the cold control pressure is fine at 14psi.?

If I depress the cup where the pin sits, the pressure smoothly rises, as it should.

But when I put the bottom back on, the two springs compress and raise the cold control pressure back up to mid-40s.

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I have done this several times. ?The pin sits in the cup in the circular disc assembly properly. ?The spring cup and the springs are assembled properly.

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Any ideas what could be going on?