Car Hard To Start When Hot. This happens if the engine is extremely hot. Some of these repairs are simple and are included in the normal maintenance of the engine.

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Difficulty in starting a car engine. Engine doesn't crank* at all; But lately i have noticed that if i’m driving around then i stop and turn off the car, i will get a hard start/turn over when turning it back on.

It Is Simply Heat Expansion.

If you have to pump the gas pedal in the morning to keep your car running, you may have a bad engine coolant temperature sensor. I found the crank sensors was not working when the car was hot. Naturally, a little longer idle time is okay in the winter while you clear snow and ice from the windshield and other car parts.

If Your Starter Easily Cranks A Cold Engine, But “Drags” Or Cranks Very Slowly When Hot, There May Be A “Heat Soak” Problem.

If that is the case you can try replacing the wires or cleaning the connections. Before you dive in too fast, it's also possible that the car has more than one thing causing a hard start. Hot starting problems (the car starts ok when cold!) hot starting problems have five principal causes:

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If Either Of Those Wires Are Making A Poor Connection Or Have Become Broken Or Corroded They Could Be Giving A Weak Signal Or Insufficient Power For Your Car To Start.

Yep that did the trick. When the engine is cold the air fuel mix enters the cylinder and is compressed and ready for ignition, cold fuel, cold air cold cylinder= lower compression. Engine doesn't crank* at all;

Then You Can Test The Coil Itself.

Fuel cannot circulate well due to the way in which vapor blocks it. The car can hesitate to start because of the air filter, especially if not enough air enters the engine. Hard starting when hot is usually a retarded timing problem.

To Test For Spark, You Should First Perform A Simple Spark Test;

Normal wear and usage can cause a hard start condition due to lack of fuel pressure, poor intake air management, false readings to the car's computer or weak spark. But since turning the gps on (what happens when you remove the temp sensor) solves the problem, i'll bet on the timing. 1) what to do when a hot engine is hard to start?