car trouble starting when hot

Remove one spark plug wire at a time and check for spark on the engine with a spark tester tool. There are only two ways it could be bad.

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On a hot day when it doesnt want to start to check to see if it getting spark and the proper amount of fuel.

. When your car starts fine cold then fails to restart while warm it is usually a coolant system problem. 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. 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.

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. 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. This thing is mounted on the throttle body and could be malfunctioning.

The vapor pressure of the gas bubble in the line is sometimes higher than. Occasionally it simply wont start when its hot out or if the engine is warmer than usual because of driving uphill etc. Once they cool your riding again until they get hot.

Idling your engine uses fuel but produces no movement you are stationary. I simply wait a little while never more than 5 minutes usually only 1 or 2 minutes and it fires right up. Technically the car still should start as it was when it is a cold morning.

Either low coolant or bad coolant level sensor. If the tool is adjusted to 30 thousandths and the spark starts jumping around then the coil. Jesmed1 April 18 2015 225am 3.

Car batteries produce less electrical current when its cold due to the chemical reaction being slower than on a warm day. Mark helpful 210 Shane answered 7 years ago. To test for spark you should first perform a simple spark test.

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. Once the car gets hot the circuit shut down the car when hot. Heres some things you should have checked.

Idle Air control valve. You could also have a bad ignition switch a bad igniter or a bad ignition coil. Your ignition coil are going bad they need to be replaced.

When the starter is hot it will not crank Heat Soak More information on BBB Industries may be found hereIf your starting cranks readily while the engine is cold but drags or cranks extremely slowly when the engine is hot it may be suffering from a heat soak problemIt is recommended that you undertake a system analysis on the. Chevrolet 2001 L4-22L Cavalier overheating no start The statements expressed above are only for informational purposes and should be independently verified. Theres all kinda relays and switches for hot starting and cold starting.

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. Below we list the four main reasons for winter starting problems. Fuel cannot circulate well due to the way in which vapor blocks it.

Start the car and let it reach normal operating temperature. If the line is poorly insulated or passes too close to a hot part like the exhaust manifold the liquid gas could vaporize. Answer 1 of 8.

The Crank or Cam position sensors can fail due to heat. Since the OP doesnt say anything about the engine cutting out when running that would point away. Plug in your scan tool and watch your short term and long term fuel trims.

Since the engine is still technically cold not at operating temps and the only thing that should be warmer is the ambient air temperature. 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.

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. Your coolant temperature sensor might be broken for instance which means that the engine will think its hotter than it is. It doesnt stop it from starting altogether but it can cause difficulty in some cases.

29 people found this helpful. Then you can test the coil itself. Cold batteries simply dont produce the same amount of power as warm batteries and this effect can lead to starting issues.

Knfenimore April 17 2015 932pm 2. Before you condemn the starter as bad you should perform a system diagnosis of the battery cables and starter. This can be a cause of the hard starting when warm.

One cause that I have seen is vapor lock of the fuel line. Usually though a crank or cam sensor would also cut out when the engine is running after getting hot. It can also be down to the engine heating up the injectors.

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.

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