What is the reason why the hot car is not easy to start, and what is the reason why the hot car is d

As for the problem you mentioned that the cool car does not get on the car, it is mainly caused by excessive carbon accumulation in the idle motor, air intake duct, intake valve and combustion chamber. Because of the excessive carbon deposit and dirt in the inlet duct, the cross-sectional area of the air passage changes, resulting in the mixture being too thick or too thin, so that the combustion is abnormal or the engine shakes or even cannot start after starting. Or because there is a problem with the fuel injector, there is leakage or too much carbon, resulting in the mixture being too thin during start-up, which makes it difficult to start.

In addition, if the canister or canister solenoid valve fails, it will also cause it to be difficult to start.

If the engine is not easy to start when it is hot, it means that the automatic choke system has failed, resulting in the choke not opening automatically or not fully opening (full open in the upright state). When the vehicle is driving, due to the large opening of the throttle, under the large intake pressure, the air flow hits the choke that deviates from the central shaft, so that the choke can be fully opened at this time, but when the engine is low or idling, the throttle opening is very small, so the intake pressure is not large, and the choke can only be half-open or the opening is very small. Under the effect of the choke gate, the mixture entering the cylinder is thicker, if the engine stops running at this time, the choke will be closed, and when the engine is started again, the overly concentrated mixture enters the cylinder and the spark plug is wet, making it difficult for the engine to start.

In this case, you can press the accelerator pedal all the way, open the choke and throttle widely, turn the starter, and dilute the excessively concentrated mixture by inhaling fresh air to start the engine. When the spark plug is heavily wet, it can be removed to dry, but it is important to go to the repair shop to find out why the choke is not fully open.

There are many reasons why it is difficult to start a hot car, which can be checked as follows:1. The starter speed is too low or the starter is slipping; 2.

Coolant temperature sensor failure; 3.insufficient fuel pressure; 4.Injector failure; 5.

Blockage of the empty air filter; 6.Whether the spark plug electrode gap is normal and whether there is carbon deposit. In most people's minds, always think.

There are many reasons why it is difficult to start a hot car, which can be checked as follows:1. The starter speed is too low or the starter is slipping; 2.

Coolant temperature sensor failure; 3.insufficient fuel pressure; 4.Injector failure; 5.

Blockage of the empty air filter; 6.Whether the spark plug electrode gap is normal and whether there is carbon deposit.

In most people's minds, it is always thought that when you want to use the car early in the morning (or if you haven't used the car for a long time), it is best for the car to start the car and idle to warm it up and wait three to five minutes before hitting the road. But in reality? Are you sure this is the right way to warm up your car?

According to statistics, more than 90% of engine parts wear and tear is caused within three minutes after a cold start.

The correct way to warm up the car should be 30 seconds to 1 minute after starting. But do not drive at high speeds at this time, but keep driving at a low speed, and do not exceed 3000 3500 rpm with the engine. Generally keep 2000 rpm.

Otherwise, the severe wear and tear of the engine and transmission cannot be restored. Wait until the engine temperature rises to normal operating temperature, and then resume the "personal habit" driving method.

What is the reason for the difficulty in starting the hot car.

There are three main reasons for the difficulty of ignition of hot cars: defects in the calibration of hot car start control, hot soaking and flooding cylinders, and insufficient ignition energy. Excessive carbon deposition on the spark plug pole or too large gap between the spark plug poles will lead to poor ignition, difficult ignition, excessive dust in the air intake system, and insufficient fuel pressure, which will affect the ignition difficulty of the vehicle.

The water temperature sensor is a very important sensor for the start signal of the car. Assuming that it is cold, because the air body is expanding and contracting, there is a large amount of air at this time, so the engine ECU will give the corresponding injection pulse width. If it is a hot car now, due to the failure of the water temperature sensor, the correct information cannot be fed back to the engine ECU, and the engine ECU does not know whether it is a cold car or a hot car now, so it cannot give an accurate injection pulse width when starting!

There are many simple reasons for this. After the hot car is turned off, the engine compartment temperature is still very high. If the fuel mass itself is volatile, it is easy to form a high evaporation pressure in the fuel rail.

When this pressure is greater than the pressure of the oil supply system, an air lock is formed, causing the oil vapor ejected from the injector to be too thin, making start-up difficult. What are the reasons why a hot car is difficult to start What is the reason why a hot car is difficult to start @2019

The reasons for the poor start of the hot car are: 1. Injector dripping: Injector fuel injection is normal, but dripping belongs to additional fuel supply, so the more serious the injector dripping, the thicker the mixture, resulting in the hot car not starting well; 2. The solenoid valve of the carbon canister is damaged

If the carbon canister has been replenishing oil and gas to the inlet tract, it will cause the mixture to be too concentrated, resulting in difficulty in starting; 3. Fuel quality: the temperature of the engine compartment is high after the hot car is turned off for a period of time, if the fuel itself is easy to volatilize, it will form a high evaporation pressure in the oil rail, and when this pressure is greater than the pressure of the oil supply system, it will form gas resistance, resulting in too thin oil vapor from the fuel injector, which will lead to difficulty in starting.

There are several reasons why the hot car does not start well:1Fuel injection bucket backup failure.

2.The injector is normal, but the dripping is an additional oil supply, so the more serious the injector dripping, the sooner the mixture will be sold, resulting in a poor start of the hot car. 3.

The solenoid valve of the carbon canister was damaged, and the mixture was too thick and difficult to start. 4.Fuel quality problems, the fuel is volatile after the flameout, forming a high evaporation pressure, resulting in difficulty in starting.

5.The air temperature sensor is faulty, making it difficult to start the hot car. 6.

Carbon deposits in the engine and adsorption of fuel cause the mixture to be too thin, which affects starting, and can also occur during cold starts.

If the engine speed is normal when starting, most of it is the problem of the oil pump, and the oil pump is aging and cannot retain oil, so it is very difficult to start.

It's a good habit to warm up the car. Not only does it give the machine a night's rest buffer, but it also allows the car to work faster. However, some friends will find that a cold car starts better than a hot car. In principle, it should be difficult to start, because the machinery of the cold car does not work. Why is this happening?

In fact, whether the vehicle starts well or not has little to do with whether it is hot or cold. The reason why a hot car starts badly after it turns off is that the air in the fuel tank is not replenished enough after the hot car is turned off, but it is only a matter of time. It starts naturally when the tank is empty and full.

In addition, it is true that there are some factors that indirectly contribute to the difficulty of starting a hot car.

1.Carbon deposition.

After the car is heated, not only the parts of the car are activated, but also the carbon deposits have a strong adsorption effect on gasoline. In this case, if too much carbon is deposited at each joint, the mixture in the engine will be reduced, which will affect the start-up.

2.Water temperature sensor.

When the car is warmed up, the water temperature also increases. Because the water temperature sensor has the function of correcting the pulse width of the fuel injection, if the water temperature sensor works poorly at this time, it will affect the fuel injection of the engine, resulting in the abnormal fuel specific air of the mixture and affecting the start.

3.Ignition coil.

When the temperature increases, the resistance of the ignition ring increases, which reduces the induced voltage, thereby weakening the spark of the spark plug, which is not conducive to igniting the mixture.

On the contrary, hot cars are difficult to start. In most cases, it is not caused by a malfunction. It may be that the hot car takes too long to cause a reaction. At this time, we can wait for a while, wait for the temperature of the vehicle to drop before starting, and the problem can generally be solved.

Most of the reason is that the temperature-dependent components or parts are affected by the temperature, and gasoline is the most directly related because gasoline volatilizes quickly due to high temperatures, which affects oil pressure and air lock. There are also water temperature sensors, temperature sensors, and so on.

I believe that some car owners can't start when they encounter overheating, that is, after driving for a while, stop and turn off the engine. After a few minutes, it's hard to get started. If you let the car cool down completely, the car can start normally again.

What's going on? What is the reason for a bad start in a hot car?

1.Injector dripping oil: The injector injection is normal, but the dripping oil is an additional oil supply, and the more serious the injector dripping oil is, the thicker the mixture, resulting in a bad start of the hot car.

2.The solenoid valve of the canister is damaged: the fuel atomization of the hot car itself is normal, and there is no need to replenish oil and gas. If the canister is still supplying oil to the air inlet, the mixture will be too thick and it will be difficult to start.

3.Combustion sock oil quality: After the hot car is turned off for a period of time, the engine compartment temperature is still quite high.

If the fuel itself is volatile, it is easy to form a high evaporation pressure in the fuel rail. When this pressure is greater than the pressure of the fuel supply system, an air lock is formed, causing the oil vapor to be too thin from the injectors, making start-up difficult.

4.Temperature sensor: The temperature sensor is similar to the water temperature sensor. Their role is to correct fuel injection. But the difference is that if the water temperature sensor fails, it will make it difficult to start cold. A faulty temperature sensor can make it difficult to start a hot car.

5.Engine carbon deposition: Engine carbon deposition has been a problem for a long time, and carbon deposition has a strong adsorption effect on gasoline.

If there is a lot of carbon deposits on the intake valves, throttle valves, pistons, etc. It is easy to adsorb some fuel, causing the mixture to be too thin, which will affect the start-up. This can also happen during cold starts.

In addition, the breakdown of the ignition coil and the poor thermal stability of the electronic components inside the ignition module are also the reasons for the difficulty of hot driving. Of course, the owner can't handle it alone. If the hot car does not start well, it is recommended that the owner go to a professional repair shop or 4S shop for maintenance.

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