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

If you dont have enough coolant in there to do the job heat will build up and your engine will overheat. Security System Or Other Electronics via smartguy Remote keyless entry and remote starting devices have been known to cause havoc.

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If your engine gets too hot certain vapours can cause obstructions which can make it harder for fuel to circulate.

. If not you should check the fuse. Car wont start when its hot outside. Yes No Tuesday July 31st 2012 AT 323 PM Please login or register to post a reply.

Be sure the key is in the On position. Try nudging the steering wheel left or right as you turn the key and the anti-theft lock feature should release giving you the ability to turn the key crank the starter and start the car. It has driven from northern California to Las Vegas San Diego and LA and back without overheating once.

The throttle body and ISC would act up when operating temperature increases. A defective sensor wont transmit the correct reluctor wheel signals back to the ICM and ECM causing improper or no spark leading to engine stalling or misfires. Using a flathead screwdriver remove the air filter cover from the tiny engine and set it aside.

Car will keep running for long miles smoothly if dont shut off the engine. Go to this link for a picture and location. Dead Battery Though it might be something else its always good to check the battery first.

Before you condemn the starter as bad you should perform a system diagnosis of the battery cables and starter. It is a small box about 1 wide by 2 length by 1 depth. If your starter easily cranks a cold engine but drags or cranks very slowly when hot there may be a heat soak problem.

Remove the lid and the air filter from the compartment. However a defective ICM could cause erratic powerground voltage to the sensor leading to inconsistent crank readings. I recommend having your vehicles no start and running hot issue be diagnosed and repaired by a certified technician such as one from.

My car cranks but won t start. Could be any of an assortment of problems. If the fuse is good your problem is the fuel pump relay.

Since the OP doesnt say anything about the engine cutting out when running that would point away. They can cause excessive low idling and would start and stall unless accelerator pressure is applied. The Crank or Cam position sensors can fail due to heat.

On the other hand it could be that you have used the wrong motor oil for the temperatures. If your car shut off while driving and it wont start it is often caused by a faulty alternator or low fuel pressure caused by the fuel pump. Up to 8 cash back The engine running hot could be any number issues ie.

Your engines cooling system relies on coolant to circulate and remove heat from the engine. Runs perfectly when it does. The car may struggle to start because of a weak battery or a bad coolant temp sensor.

There is a relay box located up underneath the drivers side dash. 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. Turn off the lawnmower.

When the engine of your car has cooled down remove the radiator cap and 2 There is a pocket of air in the heater core that is preventing the passage of water through it. The screwdriver should be inserted into the engines air intake valve. Usually though a crank or cam sensor would also cut out when the engine is running after getting hot.

If the starter motor doesnt crank and the lights are dim or dont come on at all the battery is dead or close to it. The car drives smooth good responses idle RPM is stable. Just wont start when hot but will start when cool.

Some of the most typical causes for the heating in your automobile not working correctly are as follows. A car engine would keep on gaining temperature until a while after it was shut off. 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.

Worn spark plugs produce a weak spark thats not hot enough to ignite cold fuel. Test the positive side of the fuel pump for current with a circuit tester. If the engine turns over but does not start the problem might be with the fuel supply.

By a large margin the most common cause for engine overheating is simply a low coolant level. Was this answer helpful. 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.

This isnt really a problem with newer models as most new cars are fitted with fuel injectors. Knfenimore April 17 2015 932pm 2. Worn spark plugs can cause a cranks but wont fire up condition.

Here are eight possible reasons your car wont start. This is used by the computer to determine the amount of gas to inject. Start the engine by turning the key or pulling the starter cord until it begins.

But on days that I drive to work and park the car at the end of my shift the car wont start and has taken various tines anywhere from 45 minutes to 4 hours to start. If it is inaccurate when hot but ok when cold the computer will not inject the correct amount of gas when the engine is hot and the car wont start. Click here to search for a top-rated service shop near you 1.

Its also possible that the starter motor or solenoid has malfunctioned. If you havent changed your spark plugs according to the car makers recommendations they can leave you with a car wont start when cold or worm condition. Water pump restricted radiator thermostat replaced already inoperative cooling fans restricted exhaust ie.

Since most of us dont have that type of thing check the electrical connections first. Every morning my car starts no problem. Jesmed1 April 18 2015 225am 3.

If theres current move on to the next step. The first thing Id probaby check is the engine coolant sensor. 1 An insufficient amount of coolant has been added to the system.

Wiggle the battery cables including the small wire that connects to the car s body if your vehicle has one. This of course will make it more difficult for your car to start. Pleasedodgevan2 july 5 2016 1003pm 10.

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