Did some more learning on Kjet Friday and Saturday, after reading threw a few greenbooks while actually looking at the system it makes way more sense.
Set up the tester to look at both line and control pressure, unfortunately I didn't have the fittings to do both with the valve but it's easy enough to swap the gauge with the quick disconnect fittings.
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First control pressure....hmm 70psi... So clearly I'm tapped in at the wrong place and getting line pressure measurements right
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Nope, triple checked the diagram, this is control pressure, popped the return line off the CPR, no flow from the CPR side, pulled it to find the screens chocked full of debris.
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Pulled the unit apart, looks pretty crusty inside too.
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Gave it a good cleaning (still need to bite the bullet on an ultrasonic cleaner) removed the screens, no more clog
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Checked resistance, 26ohms, build it back up and reinstalled, pressure now follows the graph perfectly, 28psi at 76?, 54psi after about 3:30 powering the bimetal strip
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Rest pressure drops way to fast still, combined with a loud pump I'm feeling fuel accumulator, but may remove the CPR again and either flip or replace the upper diaphragm.
Pulled the injectors again aswell, nearly melted some red solo cups over the valve cover to prove the injectors sprayed a nice pattern and had even flow, seem good on that side of the injection system.
Then moved to vacuum leaks again, didn't get to really sort them out last time I worked on the car.
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Found a good handful, replaced the orings on the cold start injector and idle screw. Added a few hose clamps and trimmed one line that was stretched at the end. Only remaining bit of unmetered air is getting sucked in from the EGR valve, leaks some smoke for what looks like the seal around the rod?
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Still does some rough running on start/warmup, going to take a look at the auxiliary air valve <s>tomorrow</s> later today along with valve lash. No PNP run this weekend