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

If your car wont start and no crank youve got a much larger problem. 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.

Reasons Why Your Car Won T Start Car Mechanic Hot Cars Car

This of course will make it more difficult for your car to start.

. If your starter easily cranks a cold engine but drags or cranks very slowly when hot there may be a heat soak problem. Disconnect battery then put a socket and ratchet on the crank-bolt and turn the ratchet clockwiseit should move with some. If the engine turns over but does not start the problem might be with the fuel supply.

Yes No Tuesday July 31st 2012 AT 323 PM Please login or register to post a reply. No clicking sound and no sound from the engine can indicate a bad ignition switch. Runs perfectly when it does.

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. In order to help combat this problem fuel companies offer a winter blend during cold months. A clicking noise when turning the key usually indicates a problem with the starter motor.

The sensor is one of the input that allows DME ECU to adjust fuel mix timing depending on engine temp faulty reading. Water pump restricted radiator thermostat replaced already inoperative cooling fans restricted exhaust ie. For example if your coolant temperature sensor is damaged the engine will believe that it is hotter than it actually is causing it to overheat.

Before you condemn the starter as bad you should perform a system diagnosis of the battery cables and starter. A car engine would keep on gaining temperature until a while after it was shut off. This is used by the computer to determine the amount of gas to inject.

Take a wrench or socket with ratchet and put them on the crank pulley bolt and turn the engine over by hand. Probably some nasty damage to the engine. If a car will not turn over but the lights and radio still work the problem is either a bad starter motor or a faulty ignition switch.

The fuel system provides the engine with what it needs to run by sending gasoline or diesel to the engine. 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. My engine starts and runs at high idle but will not idle once warmed up.

Problems with the Fuel System. Youll want to check the battery and ignition system first. The first thing Id probaby check is the engine coolant sensor.

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. The throttle body and ISC would act up when operating temperature increases. 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.

Went to store car ran hot let cool put new coolant in now it cranks but wont start my car has 13900 miles. If your engine gets too hot certain vapours can cause obstructions which can make it harder for fuel to circulate. Up to 8 cash back The engine running hot could be any number issues ie.

Every morning my car starts no problem. Engine coolant temp sensor sending wrong signal to DME ECU although there is supposed to be a failsafe fuel air map should the sensor fail - basic setting to get you home or to mechanic. I recommend having your vehicles no start and running hot issue be diagnosed and repaired by a certified technician such as one from.

Its possible that your car wont start in hot weather even if theres nothing wrong with your coolant levels motor oil or battery. If the car stalls even when the engine is warm the cause is likely a faulty electric fuel pump. However a defective ICM could cause erratic powerground voltage to the sensor leading to inconsistent crank readings.

Car wont start when cold but starts when warm. This might suggest that your engine has a more serious problem. It has driven from northern California to Las Vegas San Diego and LA and back without overheating once.

Could be any of an assortment of problems. This isnt really a problem with newer models as most new cars are fitted with fuel injectors. Was this answer helpful.

Car will keep running for long miles smoothly if dont shut off the engine. 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. The car drives smooth good responses idle RPM is stable.

Just wont start when hot but will start when cool. You can do a very simple evaluation for engine damage. If your car wont start but has power the culprit could be a malfunctioning fuel system.

They can cause excessive low idling and would start and stall unless accelerator pressure is applied. Seems the fans arent working.

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It Can Be Incredibly Frustrating When Your Vehicle Won T Start It Can Be Even More Frustrating Trying To Figure Car Maintenance Car Mechanic Automotive Repair