The Ford Taurus is famous for having leaking heater core. It is located on the passenger side inside the passenger compartment and inside the dashboard. It costs about $1000 to get a mechanic to fix it.
At the top of the garlic there is something quite hairy that if you cut off, it gives out a very strong smell.
Maybe the heater core is leaking.
Make sure it is full of coolant. There probably is a small leak causing the smell. Check it cold as sometimes it leaks cold but not hot.
if you smell coolant and your windows are fogged possibly it could be the heater core.
Might be a leaky heater core, the anti freeze in the coolant has a sweet smell/taste.
It might be coolant, oil burning or too rich of fuel air mixture
Possibly the catalylic converter.
Bravada smell coolant. That's how they greet each other.
A poisonous gas with a strong smell, that is used in industries and causes air pollution
The main part of diesel fuel is kerosene, which produces thick black smoke, and gives that smell that is commonly associated with diesel. most likely if it is white smoke, it is antifreeze, if it has a blue tint to it, it is oil. the smell of burnt diesel is rather strong so it could cancel the burnt oil smell, or on the other hand it could be coolant, because burned coolant doesn't have a strong smell. I would check your coolant and oil levels, and check your coolant for having oil in it.
Turn on the heat, and see if the same smell is there. The most likely cause is a coolant leak in the heater core, causing the coolant fumes to get into the ac.
The head gasket sits between the head and the engine block if it is leaking out where you can see the coolant, yes you can smell the coolant if it is leaking into the engine no you cannot smell the coolant. You can check the oil to see if it has coolant in the oil if it does then the head gasket might be blown.