I don’t understand what is different that prevents cars from starting right up in cold weather. Fuel is present, air is there..spark plugs are …sparking ..and as long as you have a strong battery the starter is turning the engine…why the struggle?
In: Technology
It is not the liquid gasoline that burns, it is gasoline vapor. Fuel injection helps to vaporize gasoline better than a carburetor, but it’s still not good if the temperatures are extra low.
If a four-stroke engine is spinning at 600 rpm to idle, then it needs a spark to ignite gasoline vapor 300 times a minute. That means the spark has to try to ignite a new sample of gasoline and air about 50 times a second.
This is why you can smell gasoline in the exhaust on a cold engine. Half of it vaporized and burned, and the other half was pushed out of the cylinder before it was able to vaporise.
Also, use synthetic oil when its extra cold, to reduce friction.
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