What to do when a hot engine is hard to start
Although usually engines exposed to cold weather is the most
known problem related to car starting difficulties, hot engines
might bring obstacles as well. Many people realize that the car
do not start as easily as it should when the engine is hot and
do not know what to do about it. In order to be able to overcome
this problem, it is important to start by learning why it
happens.
Most of the reasons by which a hot engine would be hard to start
are based on problems related to the fuel. When the engine is
too hot, fuel can't circulate properly due to the way in which
vapor obstructs it and therefore the engine wouldn't start as
easily as it should or it wouldn't start at all.
A car engine would keep on gaining temperature until a while
after it was shut off. During this period of time is when the
highest amount of vapor would be circulating around and
therefore that is when the chances it obstructs the engine are
bigger as well. This way, if you are driving in hot weather and
you have just turned off the car in which you experience start
problems, you should wait for a few minutes until starting it
back.
Fuel injected engines do not experience this problem as much as
others do due to the fact that the fuel remains inside the
injectors by being under a very high pressure. This way, fuel
injected engines would not become so easily obtruded by vapors
as other engines would and therefore the car would not have the
same problems to start as another would.
Also, engines might become hard to start while being hot if it
coincides with the season in which refiners change from a fuel
blend to another. Sometimes gasoline refiners change from a
higher volatility fuel to a lower one when summer approaches due
to the way in which hot weather causes fuel to evaporate easier.
If refiners change back to a higher volatility fuel while the
engine is still exposed to days of high temperatures, this could
cause the fuel to evaporate too much creating too much vapor and
therefore obtruding the engine.