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No miracle cures here, but I can comment on 3 items that might eliminate some distractions.
1. CIS gauge pressure adapters: Assuming none are missing, have you tried using the long (3"±) in the top (horizontal) fuel distributor fitting? I've done it that way and it leaves a short one with the same threads for the smaller CPR port.
2. Control Pressure Regulator resistance values: Forget them for now. They have nothing to do with cold starting. They just reduce the time needed to lean out the mixture for warm running, as opposed to waiting for ambient engine heat to take its effect.
3. Car starts for 1-2 seconds with starter fluid. Sure sounds like a lack of fuel. Try bypassing the fuel relay by jumpering the LEFT side contacts of fuse 7 (key-on 12V) and fuse 5, a point that leads to both pumps. and try starting.
NOTE: This will NOT completely bypass the FPR, because it won't send "bypass" voltage to the 2 heaters in the Aux Air Valve (AAV) and CPR, nor to the Lambda relay and ECU. But I don't think any of these come into effect for the first minute or so on a cold start anyhow.
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Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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