I would start by checking any leaks in your exhaust and fuel filter area, if there is any leaks throughout the exhaust the smell of gasoline or exhaust may come through into the interior.
what kind of gasoline are you running? and what color is the smoke?
For steam to come out the exhaust you probably have a bad head gasket or a cracked head. If the turbo had an oil seal fail it would cause blue smoke to come out the exhaust.
Presumably, exhaust from a gasoline or CNG engine.
incomplete combustion of the petrol in the cylinders which is then being released in the exhaust.
It comes out of your exhaust, in the engine it combusts making your car propel forward, the vaporized gasoline exits your exhaust.
It could.
It could.
incorrect engine timing so that it misfires
because of the exhaust
Chemicals that can cause gasoline to ignite include heat, sparks, and flames. Gasoline is highly flammable and can ignite easily when exposed to these ignition sources. It is important to handle gasoline with caution and avoid situations where it may come into contact with these chemicals.
Should not. The crank sensor does not come in contact with the fuel nor the exhaust.