Your description sounds like engine coolant to me.
An acrid smell is similar to a strong, sharp, and unpleasant odor that can be irritating to the nose and throat.
Ammonia has a very unpleasant, acrid odor.
The acrid smell in the kitchen could be caused by burnt food, spilled chemicals, or a gas leak.
The word "acrid" is an adjective. It is used to describe a strong and unpleasant smell or taste.
The acrid smell of smoke filled the room after the fire alarm went off.
The bitter food left an acrid taste in Neil's mouth.
Acrid refers to a strong and sharp smell or taste, often unpleasant or irritating to the senses.
Acrid
An acrid pall is an unpleasant cloud of smoke or smog that is irritating to breathe or smell. Tear gas qualifies.
The dark, acrid smoke from the burning car made my tongue taste bitter and my eyes water.
if your asking about your air conditioning, it could be your refrigerant, but a smell that would more closely resemble vinegar would probably be your coolant
Burnt powder. It is a distinctive aroma and a bit hard to describe. It is an acrid smell.