why won't my car start when the engine is hot

Your coolant temperature sensor might be broken for instance which means that the engine will think its hotter than it is. If the engine has not turned off find a place to park your car at the side of the road.

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Just wont start when hot but will start when cool.

. When Cars Wont Start Its Often Because Their Engine Oil Has Thickened In The Cold Which Increases Friction And Makes It Harder For The Starter Motor To Spin The Engine. Injector pump and or injectors or collapsing or leaking fuel lines when hotThere is also a slight chance that the valves are set too tight and when hot do not close properly but the chance of multiple cylinders to have the same problem is slim if it is only one or two valves that leak the engine will still start. Ideally the coolant temperature sensor should allow less fuel to be injected into a hot engine when it starts but if the sensor is not working correctly it will not be read the right temperature information to.

As others have said in older cars there were issues with vapor lock ie. Car batteries contain sulfuric acid that can cause serious burns. The fuel in a line that got hot and vaporized the fuel such that the fuel pump could not draw enough fuel due to the bubble in the line.

If the engine crank fails when you press Start in your push-start system car its possible your key fob has issues or is dead. Thats why a dead battery is one of the most common reasons a car wont start in the cold. However the most commonly noted cause for such a problem is the engine coolant temperature sensor.

Why wont my car start when its hot. Car wont start when its hot outside. Water pump restricted radiator thermostat replaced already inoperative cooling fans restricted exhaust ie.

If your car is hard to start when warm it could be due to a few different reasons. Its been 2 months over and over tested that in the warmed up condition loose the fuel valve top of the fuel filter a little gasoline spill put the ignition key to ON position dont see any more gas spill. However it could also be caused by a clogged air filter faulty battery connection vapor lock or a bad ground connection.

If you can drive for a bit turn the AC more and crank up the heat. Never attempt to jump start a frozen battery it can explode. Go to this link for a picture and location.

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. Dead Key Fob Battery. Its been 2 months over and over tested that in the warmed up condition loose the fuel valve top of the fuel filter a little gasoline spill put the ignition key to on position dont.

The car cranks slowly slow enough that it wont start. With a dead key fob battery the button wont receive any signal from the key fob and your car wont start. Up to 8 cash back The engine running hot could be any number issues ie.

It helps draw heat from an overheating engine. Problem 1 can be attributed to a lot of things. Car will keep running for long miles smoothly if dont shut off the engine.

There is a relay box located up underneath the drivers side dash. It is a small box about 1 wide by 2 length by 1 depth. Turn on the hazard lights then place warning triangles behind your vehicle to alert other drivers.

The car drives smooth good responses idle RPM is stable. The most common reason a car is hard to start when warm is due to a defective crankshaft or camshaft position sensor. If the engine turns over but does not start the problem might be with the fuel supply.

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. Why wont my car start when the engine is hot. A car engine would keep on gaining temperature until a while after it was shut off.

I recommend having your vehicles no start and running hot issue be diagnosed and repaired by a certified technician such as one from YourMechanic. Always wear gloves and eye protection when working around a battery or jump starting a car.

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