Personally I think your barking up the wrong tree, engine timing, dirty air filter, worn injector needle or incorrect pop off pressure would allow excessive fuel into the cylinder.
Once your engine is at operating temperature the noxious fumes your complaining about should be at a minimum.
Either purchase or make your own injector pop off tester, with the tester you can pump the pressure up just before the injector pops off, hold it at that pressure to see if the needle leaks.
If the injector pops off before or after the manufacturers specified pressure you add or remove shims, the needle is held in a closed position with a spring and it takes a desired fuel pressure to lift the spring to allow fuel to pass through the nozzle
It's the desired amount of fuel pressure that lifts the needle valve from a closed position.
A weak or broken spring will cause the needle to either not lift at all or to early. An early needle lift would starve the engine for fuel.
The DIY pop off tester in the video was made from a bottle jack.
If the nozzle is worn this will allow more fuel than is needed to pass, big higheway rigs the owners often install larger nozzles on the injectors for a boost in horse power.
You need a turbo that will give the engine lots of air the breath when your pushing extra fuel.
https://youtu.be/Oiz9C8pTDos