Why Does a Hot Engine Become Hard to Start?
When it comes to the problem in starting a car, we often believe that cold weather poses a threat to the engine. But the concern is that even hot engines may also bring obstacles as well. You might probably have experienced such a situation when your car does not start, as it should when the engine is too hot. But do you know what exactly to do when you face such a problem and if you want to overcome this problem, it is very important for you to know why it happens!
Basically, the reasons that cause a hot engine hard to start are related to the fuel. When the engine is too hot, the proper fuel circulation is obstructed by the vapor and as a result the engine cannot be started as easily as it should or sometimes it can’t be started at all. Normally a car engine keeps on gaining temperature until a while after it was shut off and during this period of time the highest amount of vapors are circulated around and therefore during this period the chances of engine obstruction are also greater.
This problem is found less in fuel-injected engines as compared to other engines. This is because, in fuel-injected engines, the fuel remains inside the injectors under a very high pressure. This is why, fuel injected engines are not obtruded by vapors as other engines and thus a car with a fuel injected engine is less likely to have problems like hard-to-start.
Apart from this, a hot engine might also become hard to start when it coincides with the season in which refiners change from one fuel blend to another. Most commonly when summer approaches, gasoline refiners switch to a lower volatility fuel from a higher volatility fuel because hot weather causes fuel to evaporate rapidly. If refiners switch back to a higher volatility fuel while the days of high temperatures are still there, this could cause the fuel to evaporate too much in an engine creating too much vapor, thereby obtruding the engine.
