But really.... clearly you don't get it man.

"The stoiciometric ratio is the ratio where the amount of air to the amount of fuel is correct
This is from where all your problems are stemming from. An engine can be perfectly stoich and at the same time be running the wrong air fuel ratio for it's requirements.

Also, a car can be running the correct Air/fuel ratio and not be stoich.

okay? Savvy? Comprende? got it?