map sensor cheating?

[fdsjakl890]

hey hey

im new here and came to seek advice from the wise elders

i recently put silvertop itbs on my map bigport and i was wondering if theres a way to cheat the map sensor to output a better signal because the vacuum is not nearly as strong as with the stock manifold. runs perfect on full throttle but anything below is just really rich so i cant really cruise at all not the end of the world really, wouldnt mind otherwise but it sips A LOT of fuel, reeks of gasoline and i think the plugs are already going bad..

one idea i had was putting a vacuum pump to kind of emulate a normal manifold and a valve that opens/closes with the engines vacuum that controls the pressure but it seems pretty complicated

second option is making some electronics to convert the current signal range back to 0-5v but i dont know if thats any easier. im not good with electronics stuff but i guess i need some kind of amplifier?

or

can i plug in an o2 sensor in the stock ecu since mine doesnt have one? i was looking at the jdm ecu pinout schematic stuff and it looked like there was a spot for an o2 sensor. if i get an o2 sensor and plug it there would that give the ecu more information to work with or does that pin even go anywhere in a map ecu?
i do have a wideband lambda installed for a mixture gauge since i wanted to see how it runs with the itbs incase its lean but i guess i couldnt use that for the ecu?

"why not aftermarket ecu?"
im going to at somepoint but i feel like thats going to take a while to set up and tune. its my daily and i need it right now. all the wiring is pretty bad so im going to redo all of it when im swapping the ecu but right now i cant really take it apart. also im poor goblin

so if theres any bandaid fixes you people know of or if i have missed something really obvious let me know