It is more than likely running rich. The Check Engine Light should be on if that is the case. Have the ECU scanned.
it smell rich almost like an onion
Crumbly in texture, dark in color, earth-like in appearance, and fresh in smell is what the result of composting looks like. Composting will break carbon- and nitrogen-rich recyclables down into their organic component parts and therefore yields the above-mentioned nutrient-rich humus.
It is rich in carbon
Coke, a carbon rich of coal.
dirty: it smells like old wood and mulch clean: smells of rich soils and distinctly like fertiliser
if they walk in together one will be rich and one will smell like scat
Nothing does. Carbon monoxide is toxic. If your blood is rich in it, you will soon be dead. Veins generally carry blood that is rich in carbon dioxide.
Three possibilities: The carburetor is set to run too rich, the plug is fouled and is not get sufficient spark, or there is a leak. Start with the leak and work backward: leak, spark, carb.
All foods are rich in carbon. Life is carbon based. All organic molecules contain carbon. I can think of a few condiments that have no carbon (salt for example).
Coca cola has a unique smell. Sweet but with maybe a slight vinegar smell?
What parts of the hearts is the blood rich in oxygen or carbon dioxide
Smelling a gasoline smell when the weather is cold could mean that the gas is set too rich. It would also be possible that the carburetor needs to be checked for a fuel leak.