Cottonwood can produce a strong, somewhat unpleasant odor when burned, often described as acrid or pungent. This is due to the high moisture content and the resinous nature of the wood. While some people may find the smell off-putting, others might not mind it as much. Overall, it tends to be less desirable for burning compared to hardwoods like oak or maple.
This would depend on your nose. A bad CMP sensor may cause improper burning of the fuel and can give a smell out the tailpipe. Will the CMP smell? Never. A Ford camshaft syncronizer will squeek and could cause a metallic burning smell.
If your talking about cars... If you smell a burning smell, or your red battery light comes on then i would get your alternator checked out!
Burning hair smells bad because it releases sulfur compounds and other chemicals that are produced when proteins in the hair break down. These compounds have a strong and unpleasant odor that is easily detected by our sense of smell.
you have a bad heater core in your vehicle
head gaskets are probably bad and leaking oil onto crossover pipe .
The smell of burning hair is often described as similar to the smell of burning feathers or a strong, acrid odor.
Bad heater core.
rough shifting of gears, slipping of gears, a burning smell from the engine may be symptoms of a bad trans axle
Your vagina is supposed to have a scent: it should smell musky but clean and will change with hormonal changes throughout your menstrual cycle and when aroused. As long as it doesn't smell bad it's not a problem, but a bad odour such as a fishy smell or a smell like bread can be a sign of a temporary imbalance in flora or a full-blown vaginal infection. Itching and burning are common during a yeast infection, but bad odour alone is a sign of an issue so see your doctor if you experience this.
The smell of burning sulfur resembles the scent of rotten eggs.
Electrical fire or bad bearings. The alternator is probably toast. Buy a new one.
heater core is bad may need a coolant flush