Starting fluid is a liquid that is used to start car engines, either when there is a problem with the ignition system or during extreme weather conditions, including extreme cold and high humidity. Starting fluid contains highly explosive chemicals, usually ether. This has a lower combustion point that either gasoline or diesel, so it ignites easier and generates more force to get the engine to turn over.
However, because starting fluid is so combustible, great care needs to be taken in its use. It should only be sprayed in short bursts and used in very small amounts. It should only be sprayed in specific areas and used only as directed by the manufacturer. Continual use can mask or exacerbate problems with your engine, so you should take the time to investigate why your car won’t start and check whether it is an engine problem that needs to be fixed.