car hard to start when warm

Your coolant temperature sensor might be broken for instance which means that the engine will think its hotter than it is. As a result the engine would not start as easily as it should.

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Ask an assistant to crank the engine while you watch the injector.

. Sometimes it can take 10 to 15 minutes of on and off trying. They often crack not sure why but the ceramic tip cracks makes the car hard to start the cars idle may race while shifting gears and often smokes. 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 air filter housing cover and filter. Most of the reasons by which a hot engine would be hard to start are based on problems related to the fuel. If the engine starts by resting your foot on the gas pedal remove the IAC and clean it again no parts involved just a shop towel and carburetor cleaner.

If not starting means the engine wont turn over once the engine is hot your starter is overheating. If the engine flooded start didnt help spray a two second shot of Starting Fluid or similar product into the air intake. 1 What to do when a hot engine is hard to start.

The car would act like it would start but the coolant switch was making the car flood. For the hot start hold the gas pedal to the floor while you turn the key to see if that does anything. Hard Starting Engine When Hot Some components or systems that cause starting problems cold may also cause problems when hot.

The car had a high gas smell when attempting to restart the motor when hot due to this. The sensor is on the right side of the. The other possibility is heat soaked ignition components.

A hard-start condition may also come from insufficient fuel. 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. I blame it on todays gas and heat soak like mentioned.

The starts fine in the morning and after the car cools down after driving. Its also possible that the starter motor or solenoid has malfunctioned. Fuel cannot circulate well due to the way in which vapor blocks it.

Once it cooled it started perfectly and ran perfectly fine. Most of the causes are fuel related problems. Reason being with bleeding injectors the longer they sit the more fuel gets dumped into the cylinder until all the pressure is bled off.

The car drives smooth good responses idle RPM is stable. First thing to determine is if its heat soak affecting the starter or the fuel systemcarburetor. Continue reading below Our Video of the Day.

Fuel Pressure Regulator This may happen on a cold engine if pressure is slowly leaking or not building appropriately. Top 5 Reasons for Hard Starting When Cold 1 Battery Issue 2 Bad Ignition Switch 3 Malfunctioning Starter 4 Wrong Oil or Too Thick 5 Bad Starter Solenoid Top 5 Reasons for Hard Starting When Cold There are many things that can cause an engine to be hard to start especially in cold weather. If it starts quickly this way there is flooding from leaking fuel injector.

This happens if the engine is. In worse cases it would not start at all. The car will crank but not start.

Car hard to start after engine is warm my 1997 saturn sl2 is really hard to start when engine is warm. Engines with Throttle Body Injection TBI System. A healthy dose of fuel injector cleaner may help.

Grab a remote starter switch and the next time you shut it down hot go out under the hood make sure its in ParkNeutral and the parking brake is set and hook up your remote starter switch to the solenoid and crank it with the ignition off. The car may struggle to start because of a weak battery or a bad coolant temp sensor. An in between stop when it is hot I usually have to hold the pedal down to get it to start and even after starting if I am going slowly like through a parking lot it might stall.

If you have headers or a bad exhaust leak this will sometimes cause the trouble youre describing. To test for this before you turn the engine over rest your foot on the gas pedal slightly to open the butterfly. If it helps then you may have a leaking fuel pressure regulator or fuel injector sending fuel into the intake on hot shut down.

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. Take a empty soda bottle fill it with 14 cup of cold water put the cap on and shake it up for about 3 seconds now squeeze the bottle it should squeeze in easily. If you replace it be sure to use dielectric grease between the module and the distributor to keep it cool.

After it runs to normal operating temperature park and turn off engine for a few minutes it wont start the engine regardless how long the starter cranks until at least 40 minutes later when everything cools down then it will start again. When the engine is cold the air fuel mix enters the cylinder and is compressed and ready for ignition cold fuel cold air cold cylinder lower compression. Before you condemn the starter as bad you should perform a system diagnosis of the battery cables and starter.

This will bypass the idle air control valve and allow the engine to start. Lack of necessary fuel system pressure will make it hard for your engine to start. Difficulty in Starting a Car Engine.

This simple test will quickly let you know if you have enough fuel going through the system. A long stop where it cools it starts fine. If the pedal on the floor doesnt help check for spark.

If the injectors were bleeding off fuel as you suggest thered be more of a problem with cold starts then warm. I have to - Saturn 1997 SL question. Mine doesnt do this in cold or cooler weather only hot.

The OP would see the issue more on the cold side than on the warm. When I drive the car a few miles and turn it off for 15 to 30 minutes it is extremely hard to start. On the other hand it could be that you have used the wrong motor oil for the temperatures.

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