[924RACR]

OK, well you should see much higher pressure with the valve closed than with it open. This does raise the question what the potential limitation here might be, if you cannot get the pressure higher from the pump (with the valve closed, gauge on the FI distributor side). It's possible, though unlikely, that the pressure regulator (in the FI dizzy) is not adjusted properly, or dirty - this is set by shims in the spring, and can be adjusted by adding/removing shims. Presumably pressure could be raised by adding shims.

Other possible sources, if that doesn't turn up anything, would be to check the pump and filter. Make sure the filter is correctly oriented, and reasonably new, check voltage at the pump, etc, make sure the pump isn't dying...