There's the electric valve and then there are the components that switch
the power TO the valve.
Have you checked if power is at the valve when cold starting - about 11
The fact that the engine starts and then idles down within a few seconds
suggests that the cold start system is working.
Sluggish acceleration is completely separate from the cold start system.
Fuel IS under about 45 psi pressure.
IMHO, the question ought to be: Why is pumping the accelerator (of this
fuel injected engine) necessary for it to start when cold? (There's no
choke to close or accelerator pump to squirt extra fuel into the engine
- so why does pumping work?)