Early EDM non-cat 4A-GE 16v Bluetop Fails emissions (high co)

[Rascal21]

As I said TPS is set (did not say I used feeler gauge, screwdriver and multimeter).
No EGR on my motor (never came with it either), as I said its a early EDM Bluetop Bigport Non-Cat Non-O2 Sensor, bare bones motor as from factory
Idle was set at 750-800 on all the tests, we also adjusted idle UP, with ZERO difference to CO emissions surprisingly.
Used the PDF file for reference and turned mixture screw (A/F Pot) all the way all sides, middle, a bit off middle, more off middle etc, both sides, got a mere 0.3% difference in CO emissions in the leaner direction, but with zero difference in idle speed, the way the engine runs or anything.

I connected test lamp to W pin on ECU, the other end to Earth, put ECU in diagnostic mode (shorting the two pins in the engine bay diagnostic plug), nothing, not one blink, tested lamp on battery, works, so it would appear everything is healthy in that regard also.
Changed ECU to be sure, still no error lamp blinking, tested most wires with multimeter, found no bad ones.
Disconnected MAP engine runs rough/quits.
Disconnect TPS, same.
Disconnect Cold Start Injector, no change in CO or O2 readings (I.e it works only when connected and only during cold start, just as it`s supposed to)
Changed Air Intake Temp sensor, Cold Start Injector, unplugged cold start injector, etc etc, nothing, CO levels always at 6,5% plus.
Installed Tomei FPR and adjusted fuel pressure to 2.4 bars (Minimum factory allowance) and it made a -0.3% difference. but was still at 7,8% CO which again is at least 6% CO too much, adjusted pressure incrementally up to around 2.8 bars (max factory setting) but still no more difference than -0.3% but at least fuel pressure regulator issues are out of the way!
No exhaust leaks, new muffler, new exhaust manifold gasket, no intake manifold leaks, when I block all air intakes = engine stalls.

Emissions should be at 1.5% +-0.5% or in my case at least below 4,5% to conform with 2T emissions (the engine that this 4AGE replaced).
It just gets way more fuel than its supposed to (0.8 Lambda values) and smells like a snowmobile!

Will try injector cleaner etc today, though I suspect that probably wont do much good either.

Again, the engine pulls like a champ, no irregularities, no lumpy idle, no bwapbwap or anything, no backfire despite apparent overfueling, nice brown/red`ish spark plugs and all of them look exactly the same, exactly how they are supposed to be.
And on that note no bigger compression difference across all cyls than 10 psi (within factory allowance).
Green temp sensor also works, when I disconnect it, cold motor idle hunts up and down until engine temps go up which also actually confirms the other sensor at the back of the head works, though I could disconnect it as well just to see what happens?

Been double checking all your suggestions and thanks a lot for chiming in everyone

And that MR2 write-up actually came in very handy for future reference, now I know what the potmeter is supposed to be dialed at and what each direction does
Thanks

Sorry for typing a lot but I don`t want anything left out

Now will check resistance across pins on all 4 injectors.