What is the reason why Santana has difficulty starting the cold car and idling unsteadily?

The main reason for unstable idling and jitter is that

1.Serious engine carbon deposits: Cars always have the problem of carbon deposits, including cylinder carbon deposits, throttle carbon deposits, spark plug carbon deposits, intake carbon deposits, etc.

When the engine has too much carbon deposit, it will affect the ignition energy, air intake efficiency and air-fuel ratio of the car, resulting in the unstable power output of the car, and the phenomenon of idle speed and acceleration jitter appears.

2.Unstable oil pressure: If you have cleaned the engine carbon deposits, cleaned the throttle, replaced the oil gasket and spark plug, etc.

And when idling, you still find that the body shakes, it is recommended that you go to the 4S shop to check whether the oil supply pressure and intake pressure sensor are normal, if the oil pump supply pressure is abnormal, or the intake pressure sensor value is wrong, and the work is not good, it will cause the body to shake.

3.Engine cylinder shortage: Engine cylinder deficiency mainly refers to the engine one or more cylinders are not working properly, which is generally manifested as:

The exhaust fumes coming out of the car are obviously intermittent, and the exhaust pipe shakes violently, and the engine shake can be clearly felt, sometimes accompanied by abnormal noises. This is mostly related to ignition coil failure.

4.Aging of engine parts: Shake in the car is also associated with the aging of the engine feet (also known as claw pads).

The engine foot is actually the shock absorber system of the engine. The engine feet are responsible for absorbing slight vibrations when the engine is running. If there is a problem with the engine base, these vibrations can be transmitted to the steering wheel and cab, causing vibrations at idle.

Solution; The best way is to clean the oil circuit, clean it regularly, and use PNF fuel additives to solve the above problems caused by carbon deposits. The fuel quality is not very good or the initial fuel of the new car is stored for too long, resulting in a rapid increase in the colloidal composition of the oil circuit, which will continue to pollute the fresh fuel and cause no good fuel to participate in combustion in the later stage, and the carbon deposition exceeds the standard, which is especially common for China VI vehicles. We can only gradually alleviate most of the problems by maintaining clean oil circuits.

1.Air intake system: leakage in the intake pipeline, dirty throttle or inlet tract, failure of idle motor, failure of air flow meter or intake pressure sensor and circuit.

2.Fuel system: Dirty and loose sealing of the injector, poor oil circuit or pipeline blockage caused by dirty filter blockage, fuel pump failure, fuel pressure regulator failure.

Inaccurate oil supply caused by sensor or line failure, such as throttle position sensor, air flow meter sensor, water temperature sensor, oxygen sensor, etc.

3.Ignition system: spark plug burning, ignition high-voltage line leakage, ignition module power supply or grounding poor looseness, ignition coil failure, ignition time inaccuracy due to electrical components or line faults, such as camshaft position sensor, air flow sensor, inlet pressure sensor and other open circuit, short circuit fault.

4.Mechanical failure: the cylinder pressure is too low, the timing belt is misaligned, the camshaft is too low to wear, and the engine feet are broken due to poor sealing caused by carbon deposition in individual cylinders and valves. The idle speed adjustment is too low.

The specific elimination method should be based on the specific reaction of your engine, from simple to complex, and slowly search. If you can't find it, go to the repair shop and use the computer to find the fault point.

The causes of engine misfire and the symptoms when it occurs.

Engine cylinder lack and misfire is a meaning, but the name is different, cylinder lack and misfire both refer to a cylinder or multiple cylinders in a multi-cylinder engine does not work or can not work normally; After the failure of missing cylinder misfire, the engine will have severe shaking, resulting in insufficient power, weak acceleration, high fuel consumption, and if it is a multi-cylinder misfire, the engine may not start.

Special attention should be paid to the fact that some cars will still inject fuel from the fuel injector when they lack cylinders, so that the unburned gasoline mixture enters the exhaust pipe and continues to burn where the three-way catalytic converter is located, resulting in the three-way catalytic converter being scrapped due to high temperature.

The causes of engine misfire can be divided into two main categories.

1. Failure of the electronic control system, such as sensor signal loss or signal inaccuracy, wrong control signal or no signal output, failure to ignite due to damage to the spark plug or ignition coil, no fuel injection from the fuel injector and line failure, etc.

2. Mechanical failure, mainly due to insufficient cylinder pressure, such as valve closure is not tight, air leakage, the gap between the cylinder, the piston, and the piston ring is too large, resulting in insufficient compression ratio in the cylinder.

The lack of cylinders in the engine will bring great harm: the speed and power of the engine will decrease. Increased fuel consumption and emissions of pollution. Aggravate the wear of running parts and shorten the service life of lubricating oil. The engine is missing cylinders and needs to be overhauled in time.

The solution to the lack of cylinders in the engine:

1. Circuit failure: spark plugs, cylinder wires, ignition coils, etc. are damaged, and it is easy to lack cylinders. You can use the broken fire to determine which cylinder parts are damaged, and replace the damaged parts;

2. Oil circuit: If the oil circuit is not cleaned for a long time, there will be more gum and magazines in the oil circuit, and the fuel injector will be blocked. The oil cut-off test is used to detect the fault point and carry out maintenance;

3. Mechanical failure: the internal piston, connecting rod, piston ring, piston pin, etc. of the engine are faulty, which are generally accompanied by obvious abnormal noise, and obvious metal chips can be seen when detecting the oil. Generally, this situation requires the engine to be dismantled.

The idle speed of the air conditioning engine is generally due to the dirty throttle valve, which affects the engine. The following is a specific introduction to the dirty throttle valve of the car:

1. Reasons for idle jitter: The compressor will also work after the air conditioner is turned on, and the compressor is driven by the engine, so the work of the compressor will increase the load of the engine, and the increase in load will increase the throttle opening and increase the air intake. If the throttle valve is not maintained for a long time, it is easy to produce carbon deposits, which will hinder the air intake of the engine, resulting in insufficient or reluctant engine to drive the compressor, resulting in idle jitter.

2. The throttle needs to be cleaned: if the driving environment is relatively bad, it is best to clean it regularly, and it is recommended to clean it once every 10,000 kilometers.

If the idle speed of the cold car is unstable, in this case, check the throttle for a mile. If there is still a problem, then there may be a problem with the idle motor, and if the car disappears after it is hot when it is cold, there is no need to worry about this.

This situation may be caused by excessive carbon deposits on the throttle, and it is recommended to clean and inspect it in time.

Hello, the situation of unstable idling of this car is generally caused by excessive carbon accumulation on the throttle, it is recommended to clean it!

If the vehicle is unstable at idle, it is considered to be caused by excessive carbon deposits, so it is recommended to do a throttle cleaning and oil circuit cleaning.

In this case, it is recommended to check whether it is caused by carbon deposits? Mainly check throttle valves, fuel injectors, and spark plugs.

What's going on with the unstable idle speed of the Posang cool car Cold start, the three-way catalytic temperature is not enough, and the most common reason for the serious carbon deposition of the engine causing the car to shake is that the throttle is too dirty or the fuel injector has too much carbon deposition, because the gasoline adsorbed on the carbon deposit after the car is sucked into the cylinder by the engine for combustion, and the combustible mixture of the engine is dilute and thick, resulting in idle shaking after cold start. Solution: Siyoupu cleans the oil circuit and checks whether the idle motor has carbon deposits and should be cleaned.

Hello, this is generally a problem with the thermostat or the throttle is dirty, you can check it.

Santana ( Check price |The reasons for the difficulty in starting when it is cold are the low temperature of the engine, excessive carbon deposits in the valves and intake tracts, and the failure of the water temperature sensor.

1. Low temperature of the engine: The temperature in the engine is not enough, and the temperature of the fuel and lubricating oil is not enough, so it should be raised to meet the requirements of power during cold start. At low temperatures, the fuel atomization is not good, resulting in a decrease in ignition energy, which affects the dynamics and makes the car shake.

Ignition energy can also be reduced due to aging of the ignition coil, aging of the high-voltage line of the spark plug, or leakage.

2. Excessive carbon deposition in the valve and intake tract leads to difficulty in cold starting: when there is too much carbon deposition inside the engine, the gasoline sprayed by the cold start injector will be absorbed by a large amount of carbon deposit, resulting in the mixture of cold start being too thin, making it difficult to start, until the gasoline absorbed by carbon deposition is saturated, it is easy to get started, and the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the engine for combustion, which makes the mixture thicker, and the combustible mixture of the engine is dilute and thick, resulting in idle shaking after cold start.

3. Water temperature sensor failure: If the temperature of the engine is minus 10 degrees Celsius when the engine is cold started, but the sensor "tells" the computer "the temperature is 20 degrees Celsius", then the computer will inject fuel according to the working condition of 20 degrees Celsius, and the amount of oil should be small, and the shaking is of course natural. (Photo by photo:.)

Zou Ting1) @2019

What is the reason for the difficulty in starting the Santana in cold weather The reasons for the difficulty in starting in cold weather are the low engine temperature, excessive carbon buildup in the valves and air intakes, and a faulty water temperature sensor. Low engine temperature: The internal temperature of the engine is not enough, the temperature of fuel and lubricating oil is not enough, and more fuel should be injected during cold start to meet the power requirements.

Poor fuel atomization at low temperature in the terminal section leads to a decrease in ignition energy, which affects the power performance and makes the car shake. Aging of the ignition coil, aging of the spark plug high-voltage wire, or leakage can also reduce the ignition energy of the local rise. Too much carbon deposits on the valves and air intakes, making it difficult to start a cold car

When the engine has too much carbon deposit, the gasoline sprayed by the cold start fuel injection head will be absorbed by a large amount of carbon deposit, resulting in the cold start mixture being too thin, and it is difficult to start, and it is easy to start the car until the gasoline absorbed by the carbon deposit is saturated, and the vacuum suction of the engine will be adsorbed on the carbon deposit and suck it into the cylinder for combustion, which will make the mixture thicker, and the combustible mixture of the engine will occasionally be sparse. Water temperature sensor malfunction: If the engine temperature is minus 10 degrees Celsius during cold start, but the sensor tells the computer that the temperature is now 20 degrees Celsius, then the computer will inject fuel at 20 degrees Celsius.

Of course, the amount of oil should be small, and engine shaking is natural.

The main manifestations of the unstable idling speed of the new Santana are: when the idle speed is running, the car is trembling and the speed ratio is uneven. It happens for a number of reasons:

The idle air volume hole is blocked, the idle equipment is not working well, some of the alarm cylinders are too weak with the spark plug flame of the car, some cylinders are not tightly sealed, the intake branch pipe is leaking, the ignition room is too early or too late, and the idle speed adjustment is unreasonable.

When the idle speed of the automobile engine is unstable, the idle speed should be adjusted first, if the common fault can not be cleared after the idle speed adjustment, it should be checked whether the idle speed measuring hole and the idle air measuring hole are blocked, if the measuring hole is blocked, it can be cleaned with vehicle gasoline or toluene and then blown through with compressed gas; If the measuring hole is not blocked, the speed of the car should be stabilized at a certain speed ratio, and whether there is air leakage in the intake branch pipe or carburetor and the lower gasket, if the air leakage occurs, it can be removed by tightening the bolt or adding or subtracting the washer.

If the idle speed is unstable and accompanied by the reduction of engine displacement, the working condition of the spark plug of the car, the sealing characteristics of the cylinder and the lighter room should be further checked, and maintenance and adjustment should be carried out if necessary.

Millions of car purchase subsidies.

The main manifestations of the unstable idle speed of the new Santana are: when the idle speed is running, the engine of the car is trembling and the speed ratio is uneven. It happens for a number of reasons:

The idle air volume hole is blocked, the idle equipment is not working well, the spark plug flame of some cylinders is too weak, some cylinders are not tightly sealed, the intake branch pipe is leaking, the ignition time is too early or too late, and the idle speed adjustment is unreasonable.

When the idle speed of the automobile engine is unstable, the idle speed should be adjusted first, if the common fault can not be cleared after the idle speed adjustment, it should be checked whether the idle speed measuring hole and the idle air measuring hole are blocked, if the measuring hole is blocked, it can be cleaned with vehicle gasoline or toluene and then blown through with compressed gas; If the measuring hole is not blocked, the speed of the car should be stabilized at a certain speed ratio, and whether there is air leakage in the intake branch pipe or carburetor and the lower gasket, if the air leakage occurs, it can be removed by tightening the bolt or adding or subtracting the washer.

If the idle speed is unstable and accompanied by a decrease in engine displacement, the working condition of the spark plug of the car, the sealing characteristics of the cylinder and the ignition time should be further checked, and maintenance and adjustment should be carried out if necessary.