What are the general reasons why it is difficult to start a hot car with an EFI engine?

There is an air leak in the air intake system; The fuel pressure is too low; The air filter is clogged; Faulty water temperature sensor; Failure of the air flow meter; Failure of the idle control valve or additional air valve; The cold-start injector does not work; Injector leakage; Incorrect ignition timing; The wiring from the starter switch to the computer is disconnected; The cylinder compression pressure is too low.

When an EFI engine starts, the ECU needs an engine temperature signal to control the amount of fuel injected. The signal comes from the water temperature sensor, if the temperature sensor is damaged, the ECU will not receive the normal engine temperature signal, the starting fuel injection is too small, and it is difficult to start in the case of cold car. After the car is warmed up, it will return to normal.

Summary. There are five main causes of startup performance failures.

First, check the battery voltage, the battery voltage is lower than 12 volts is a loss of power in the car, which will lead to difficulty in starting.

Second, check the starter, the starter will be used for a long time, the internal carbon brush will be seriously worn, the overpower can not be sufficient, and the start is weak. It is mainly found in cars with a large number of kilometers.

Third, the gasoline pressure, mainly including the gasoline pump pressure and the gasoline filter element is dirty, the gasoline pump needs to be replaced, and the gasoline filter element is recommended to be replaced for 40,000 kilometers.

Fourth, the throttle is too dirty, resulting in insufficient air intake, which needs to be cleaned up.

Fifth. Ignition of the ignition coil of the fire plug is too weak and the air flow sensor is faulty, resulting in a delay in start-up. It needs to be replaced.

There are five main points of boot performance failure. First, check the battery voltage, the battery voltage is lower than 12 volts is a loss of power in the car, which will lead to difficulty in starting. Second, check the starter, the starter will be used for a long time, the internal carbon brush will be seriously worn, the overpower can not be sufficient, and the start is weak.

It is mainly found in cars with a large number of kilometers. Third, the gasoline pressure, mainly including the gasoline pump pressure and the gasoline filter element is dirty, the gasoline pump needs to be replaced, and the gasoline filter element is recommended to be replaced for 40,000 kilometers. Fourth, the throttle is too dirty, resulting in insufficient air intake, which needs to be cleaned up.

Fifth. The ignition of the ignition line with the blue ring of the fire plug is too weak, and the failure of the air flow sensing repentance device leads to the start delay. It needs to be replaced.

Summary. The practice of diesel engine is difficult to start: 1. Preheat when the temperature is low; 2. Do a good job in the sealing performance of the cylinder; 3. Eliminate the air in the oil circuit; 4. Check each pipeline to see if the joints are not strict; 5. Disassemble the injector and clean the needle valve; 6. Check whether the battery line is short-circuited; 7. Add a sufficient amount of diesel fuel to the fuel tank; 8. Replace the diesel model used.

The reasons why the diesel engine is difficult to start are: 1. Failure of the fuel supply system; 2. The gas pressure in the combustion chamber is insufficient; 3. There is no oil in the fuel tank or you forgot to turn on the fuel tank switch; 4. Blocked pipelines or filters; 5. The fuel injection pump is worn; 6. The injector needle valve is stuck.

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The practice of diesel engine is difficult to start: 1. Preheat when the temperature is low; 2. Do a good job in the sealing performance of the cylinder; 3. Eliminate the air in the oil circuit; 4. Check the pipes of each beam to see if the joints are not strict; 5. Disassemble the injector and clean the needle valve; 6. Check whether the battery line is short and high-linked; 7. Add a sufficient amount of diesel fuel to the fuel tank; 8. Replace the diesel model used. The reasons why diesel engines are difficult to start are:

1. Failure of fuel supply system; 2. The gas pressure in the combustion chamber is insufficient; 3. There is no oil in the fuel tank or you forgot to turn on the fuel tank switch; 4. Blocked pipelines or filters; 5. The fuel injection pump is worn; 6. The injector needle valve is stuck.

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We are happy to answer that the general reasons why an EFI engine is difficult to start a hot car are: Air intake system failure: The air filter of the air intake system is blocked or the intake manifold is leaking, which can cause the engine to start difficult.

Fuel System Failure: A clogged or damaged fuel pump or fuel filter can cause a drop in oil pressure and make it difficult for the engine to start hail. Ignition system failure:

Failure of spark plugs, ignition coils, distributors and other components will cause poor ignition of the stool and difficulty in starting the engine. Faulty crankshaft position sensor or camshaft position sensor: A faulty crankshaft position sensor or camshaft position sensor can cause the engine to not accurately detect the crankshaft and date or camshaft position, making it difficult to start.

Engine Control Unit Failure: Engine Control Unit failure can cause the engine to not receive the correct start signal, making it difficult to start. A thorough inspection of the vehicle is required to find out the specific cause and repair and replace it accordingly.

It is recommended to go to a professional repair station or authorized service center for diagnosis and repair. <>

Summary. Hello, the reasons why it is difficult to start a hot car with EFI engine include air flow meter, intake pressure sensor, and water temperature sensor. These need to be observed through the data stream, generally in this case, the general computer is not faulty, only through the data stream to observe the fault can be found.

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Hello, the reasons why it is difficult to start a hot car with an EFI engine include an air flow trouser meter, an intake pressure sensor, and a water temperature sensor. These are all required to be observed through the data stream, and if this situation occurs in the general cavity burner, the general computer is not faulty, and the fault can only be found through the observation of the data stream.

FYI, 1. Sensor failure; 2. The quality of gasoline is not up to standard; 3. The air leakage of the inlet pipe leads to the mixture being too thin; 4. The fuel pressure is low, and the injector and fuel filter are blocked; 5. The signal of the pressure sensor and the throttle position sensor is abnormal; 6. The ignition timing is inaccurate and the ignition is too late. 7. Weak high-voltage sparks due to poor spark plugs, igniters or high-voltage wires; 8. The throttle is dirty; 9. The exhaust gas recirculation system works poorly; 10. The exhaust pipe is blocked; 11. The sliding force of the cylinder pressure hall is low; 12. Turbocharging system failure 13. Clutch three-piece set 14 Air filter blockage, piston ring break or stuck, poor valve sealing, late ignition time, carburetor mechanical failure, air intake pipe leakage, individual cylinders do not work well or do not work, etc. However, some of the faults of insufficient engine power can be solved by use. Such as:

General wear of the cylinder, poor flow of the carburetor oil passage, etc. When the user reflects the lack of engine power, burning oil, we should first judge the cause of insufficient power, in the exclusion of the air filter blockage, carburetor throttle can not be fully opened, ignition timing is not good, the intake pipeline gasket is damaged, individual cylinders do not work or work badly after the cause, and then according to the engine fuel consumption is too high to judge the carburetor work, if the fuel consumption is too high, the exhaust smoke is very thick, it is likely that there is a mechanical failure such as the amount of disadvantage and hole off, Such a failure must be repaired as necessary. Finally, we have to judge the wear and tear of the engine cylinders.

Engine wear directly affects the tightness of the cylinder; Therefore, checking the tightness of the cylinder can largely reflect the degree of wear of the cylinder, and the most convenient way to check the tightness of the cylinder is to use the cylinder pressure gauge to check the compression pressure of the cylinder.

1. The starter is damaged, under normal circumstances, the service life of the starter is about 100,000 kilometers, if it is not replaced for a long time, it will easily cause damage to the carbon brush, which will cause the vehicle to not catch fire. 2. When the gasoline pump of the vehicle is damaged, it will lead to the failure of normal fuel supply, resulting in the vehicle not being able to ignite. 3. The battery voltage is insufficient, when the battery voltage is insufficient, it will cause the engine to start abnormally, so that the vehicle cannot ignite.

4. When the gear is in the position of D gear, it will cause the vehicle to fail to ignite. This brother fight is a self-protection mechanism for the vehicle, so as to avoid the vehicle from rushing forward directly after ignition. The EFI vehicle is mainly a vehicle equipped with electronics to control the fuel injection system.

Gasoline injection is mainly through the injector, and then under low pressure, gasoline is sprayed into the intake tract or intake main pipe in a mist manner, and then mixed with air to form a combustible mixture.

Hope this helps, hopefully!!

The CAN bus is faulty, and the CAN interface of the ECU is not in good contact. 2.Excessive dirt and carbon deposits, abnormal air flow, unable to accurately control the normal air intake volume, resulting in unstable gas content, so that the engine can not work well.

3.The low level of atomization of the system due to the low fuel pressure and poor constant pressure performance leads to the low level of atomization of the system, which makes it difficult for the car to start. Extended Information on Car Dashboards 1

The car dashboard is a device that reflects the working conditions of each system of the vehicle. Different cars have different gauges. However, the conventional instruments of general automobiles include speedometer, tachometer, oil pressure gauge, water temperature gauge, fuel gauge, charging gauge, etc.

2.A variety of indicators or warning lights are made under the instrument panel of modern automobiles, such as coolant level warning light, fuel level indicator, washer liquid level indicator, charging indicator, high and low beam dimming indicator, transmission gear indicator, brake anti-lock braking system (ABS) indicator, drive force control indicator, airbag (SRS) warning light, etc.