OK, now that I have all of the "maintenance" items replaced and the fuel system set, I do believe this height adjustment of the SP is the root cause of the issue.

The SP sets at bottom of the straight part of the inlet funnel. When I had the engine in 'limp home' mode and running, raising the SP kept increasing the RPMs. At one point, the RPMs jumped to 5K and I had to kill the ignition to get the engine under control.

How do I move the SP up to the correct position? Will adjusting the 3mm screw in the adjustment tower raise the SP?

What do I do about the runaway RPMs as I get closer to the proper A/F ratio? Will that be correct when all of the engine controls are added back into the mix?

Should I adjust the stop pin for the SP height before I do anything else?

I have reset the Plunger Stop at 0.6 mm. The EHA is set at 0.4 bar DP, unplugged. Where the SP sets is where it was when I got the car.