car trouble starting when hot

When the engine is too hot fuel cant circulate properly due to the way in which vapor obstructs it and therefore the engine wouldnt start as easily as it should or it wouldnt start at all. Up to 8 cash back It sounds like the ignition coils are getting hot and when the engine is shut off the engine will not restart due to an ignition coil that will not produce a spark.

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I simply wait a little while never more than 5 minutes usually only 1 or 2 minutes and it fires right up.

. You could also have a bad ignition switch a bad igniter or a bad ignition coil. 29 people found this helpful. Last month my car wouldnt start It cranks fine.

Usually though a crank or cam sensor would also cut out when the engine is running after getting hot. Idling your engine uses fuel but produces no movement you are stationary. The Crank or Cam position sensors can fail due to heat.

Jesmed1 April 18 2015 225am 3. Answer 1 of 8. If the line is poorly insulated or passes too close to a hot part like the exhaust manifold the liquid gas could vaporize.

Up to 8 cash back I recommend having your vehicles no start and running hot issue be diagnosed and repaired by a certified technician such as one from YourMechanic. Your ignition coil are going bad they need to be replaced. Using the wrong oil.

To test for spark you should first perform a simple spark test. Car wont start when cold but starts when warm 1. If theres nothing wrong with your coolant levels your motor oil or your battery and your car still wont start in hot weather it could indicate a deeper issue with your engine.

It doesnt stop it from starting altogether but it can cause difficulty in some cases. Since the OP doesnt say anything about the engine cutting out when running that would point away. Your coolant temperature sensor might be broken for instance which means that the engine will think its hotter than it is.

If the car is stopped the higher temperature of the relay creates a high enough resistance to keep the relay from picking up when the car is started again. Other Possible Causes of Hot Start Problems Before you dive in too fast its also possible that the car has more than one thing causing a hard start. Technically the car still should start as it was when it is a cold morning.

So I changed my fuel pump and then it started but still had trouble starting when engine is hot. Before you condemn the starter as bad you should perform a system diagnosis of the battery cables and starter. The vapor pressure of the gas bubble in the line is sometimes higher than.

If the tool is adjusted to 30 thousandths and the spark starts jumping around then the coil. Idle Air control valve. When your car starts fine cold then fails to restart while warm it is usually a coolant system problem.

Starter Will Not Crank When Hot Heat Soak If your starter easily cranks a cold engine but drags or cranks very slowly when hot there may be a heat soak problem. Plug in your scan tool and watch your short term and long term fuel trims. Start the car and let it reach normal operating temperature.

Occasionally it simply wont start when its hot out or if the engine is warmer than usual because of driving uphill etc. Either low coolant or bad coolant level sensor. Once they cool your riding again until they get hot.

On a hot day when it doesnt want to start to check to see if it getting spark and the proper amount of fuel. Whether your car is old or. When your car is ideal it can result in the chemical in the battery to hold back.

Pouring wrong oil in your car is like feeding wrong food to a kid. Remove one spark plug wire at a time and check for spark on the engine with a spark tester tool. Once the car gets hot the circuit shut down the car when hot.

This sounds as if the fuel pump gets weak after it heats upyou need to heck the fuel pressure after it is hotthese must have no less then 9psi regulated fuel presurealso a bad pick-up coil inside the distributer can cause a simuler problemcheck these two things. This thing is mounted on the throttle body and could be malfunctioning. Knfenimore April 17 2015 932pm 2.

I have a 98 mustang gt which was easy to start when cold but hard to start when engine hot was happening for a couple years. Hot starting problems the car starts ok when cold hot starting problems have five principal causes. A car engine would keep on gaining temperature until a while after it was shut off.

Mark helpful 210 Shane answered 7 years ago. Chevrolet 2001 L4-22L Cavalier overheating no start The statements expressed above are only for informational purposes and should be independently verified. Heres some things you should have checked.

This can be a cause of the hard starting when warm. There are only two ways it could be bad. Fuel cannot circulate well due to the way in which vapor blocks it.

One cause that I have seen is vapor lock of the fuel line. It can also be down to the engine heating up the injectors. Then you can test the coil itself.

Theres all kinda relays and switches for hot starting and cold starting. Since the engine is still technically cold not at operating temps and the only thing that should be warmer is the ambient air temperature.

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