Beverly s normal idle speed is 800 rpm, but recently it is close to 1000 rpm, and the idle speed is

There are several reasons for engine shake:

1. The engine has serious carbon deposits, and the most common car with serious shake is that the fuel injector throttle valve is too dirty or too much carbon;

2. Ignition system problems, check the working conditions of spark plugs, high-voltage wires and ignition coils;

3. The oil pressure is unstable, if the first pressure of the pump is abnormal or the error and poor work of the inlet pressure sensor will cause the body to shake;

4. Aging of engine parts; Excessive carbon deposits in engine emissions absorb carbon from the gasoline of the cold-start injector, which leads to a dilute cold-start mixture and difficulty starting.

Severe idle vibration is generally caused by engine cylinder failure, aging or loose foot rubber, carbon deposits, fuel system failure, etc.

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, there is no specific experience in the research and development parameters of the clean engine from the new car, coupled with the continuous improvement of emission standards, can not adapt to the change of fuel, all manufacturers of the engine are unable to solve this jitter problem in the short term, plus the fuel quality is not very good or the initial fuel of the new car factory 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. The occurrence of excessive carbon deposits is especially common for China VI vehicles. We can only gradually alleviate most of the problems by maintaining clean oil circuits. The use of PNF dope fuel additives can solve the problems caused by carbon deposition.

It may be that the throttle and idle motor are dirty, and you use a detergent to clean them, or you can find a car repairer to help you get them, or it may be that there is a leak in the air supply line behind the throttle.

Overhaul it. Generally fine.

The normal idle speed of Fukang is 800 rpm, but recently it is close to 1000 rpm, and there is jitter at idling, there are generally several situations in the fault diagnosis of engine idle jitter, the engine carbon deposition is serious and the most common reason for the shake of the car is that the engine has a general cleaning agent, which can remove carbon deposition and dismantle the engine oil to clean the carbon sludge, which is very convenient to use, and the suspension differentiation is not blocked, and the miscibility with the oil will not lead to delamination, so as to clean your engine better and safer.

When the car starts, the idle speed is 1200 and drops above 800 in about a minute. This is normal and high idle lasts longer during the winter months. If the summer duration is less than 1 minute, the speed will drop after 30 seconds of summer.

This is normal. When the engine starts, the ECU will check the signal from the water temperature sensor. If the water temperature is low, it will initiate a quick warm-up procedure.

The specific performance is to increase the engine speed. Increase the rotational speed for stronger intake airflow, which increases the fuel atomization process. Since gasoline is not easy to atomize at low temperatures, the small intake flow at idle speed is not conducive to gasoline atomization, and increasing the speed can bring stronger intake flow and improve the degree of gasoline atomization.

The reason for this phenomenon when the engine is started is because the car is parked overnight, and a series of conditions such as oil temperature and water temperature are not ideal. When we start the car, in order to make the car enter the state faster and reach the ideal temperature quickly, the ECU will increase the fuel injection of the fuel injector and increase the throttle opening to ensure a larger air intake, as the air intake increases, the idle speed of the car is naturally higher than normal. After the car is parked overnight, the oil flows back into the oil pan, especially in winter, when the flow of the oil at low temperatures is reduced.

To keep the oil flowing quickly, most engines are set to low temperature cranking and high idle. During starting, it is normal for the idle speed to be at high rpm for the first 1 or 2 minutes. This process can end in the summer, even 2 to 30 seconds.

If you feel that the idle speed is also high during normal driving, you can remove the carbon deposit.

The engine is made up of different steel or aluminum. Due to thermal expansion and cold contraction, the gap between each component in the cold state will be too large or too small, resulting in harsh conditions such as excessive noise, poor combustion, idle jitter, and increased power assist inside the engine. In order to get the engine into normal working condition as soon as possible, the engine is designed to increase the amount of fuel injected and the amount of air intake when the water temperature is low, so as to increase the engine speed, which is intentionally controlled by the engine computer.

The main purpose of increasing the idle speed of the engine when it is cold is to avoid idling and stalling when the engine is cold, reduce the shaking, so that the water temperature, oil temperature and three-way catalyst can quickly reach the optimal working temperature, reduce engine wear, improve combustion efficiency and improve emissions.

When a car catches fire, the engine speed is higher than the normal idle speed, which is commonly known as the high idle state of the engine. The speed can reach 1200-1500 rpm, and gradually fall back to the normal idle speed of about 800 rpm in about half a minute. This phenomenon is normal for all vehicles.

The purpose of high idle is to increase the engine temperature as quickly as possible to achieve the optimal operating temperature. It is normal and common for the car to slow down to 1200 when it starts, and then fall back to more than 800 in about a minute. In the winter, the high idle lasts longer, but if it lasts less than a minute in the summer, it usually lasts 30 seconds.

The reason for this phenomenon when the engine is started is that due to the car being parked overnight, a series of conditions such as oil temperature and water temperature are not ideal, so when we start the car, the ECU will increase the fuel injection volume of the injector and the opening of the throttle in order to make the car enter the state faster and reach the ideal temperature quickly. Everything has the characteristics of thermal expansion and contraction, and the cylinders, pistons and all moving parts of the engine will expand and contract. Therefore, the gap between the moving parts is different when cooling and heating the car.

The engine is then designed to an optimal operating temperature, which is around 90 degrees for most vehicles. By calculating the degree of thermal expansion and contraction, a certain expansion gap is reserved when cooling the car. When this temperature is reached, the gap between the components is optimal.

In other words, if the optimal operating temperature is not reached, the gap between the moving parts must be too large, because the temperature is low and the parts are in a shrinking state.

1200 starts to idle, and it returns to about 800 900 in a minute, because the engine of the car now has a high technology content, the idle speed is hot, and the cold car starts at 1200 rpm, and it drops to about 800 rpm in a few minutes. Since gasoline is not easy to atomize at low temperatures, the smaller intake flow at idle speed is more unfavorable for gasoline atomization, and increasing the speed can bring stronger intake flow and improve the degree of gasoline atomization. All cars now have a three-way catalytic converter that is installed at the front of the exhaust pipe to process carbon monoxide and hydrocarbons in the exhaust gas.

The three-way catalytic converter needs to work at a certain temperature, so when the cold car starts, the ECU will delay the ignition to slow down the combustion of gasoline, so that the exhaust gas temperature will rise, and the three-way catalytic converter can heat up faster.

Just starting the engine with high speed, to solve this problem, you need to understand the principle of engine cold starting. This is mainly because the engine is in a cold state, the water temperature in the engine is relatively low, the engine control computer in order to make the water temperature reach the normal working temperature faster, it will control the amount of fuel injection, for example, the lower the temperature, then the more oil the injector will spray, which is equivalent to a thickening effect on the injector, so this is a normal phenomenon, when the engine of some cars starts, the moment of ignition can reach more than 2000 rpm, and the sound is also very loud, which is also normal.

Because the engine speed is getting smaller and smaller in the process of deceleration, the engine speed will recover when the brakes are applied.

The car shakes at 1000 to 1500 rpmIdlingThe normal causes and workarounds are as follows:

1. Low cylinder pressure: the engine has 3 cylinders, 4 cylinders, 5 cylinders, 6 cylinders, and 8 cylinders. Three-cylinder engines are the most obvious, followed by four-cylinders. with a cylinder pressure gauge.

Check the cylinder pressure, and use Xinba to solve the fault of high pressure and low force. Xinba has a unique effect on low cylinder pressure and unbalance. It can be added to the engine oil or directly added to the cylinder to restore the balance cylinder pressure.

2. Carbon deposition. Grease blockage: throttle.

The idle valve and air intake hole will be blocked by carbon deposits, oil scale, and poor air intake, which will affect the stable idle speed and shaking. It is necessary to inspect and clean the above parts with cleaning agent, and there is no need to remove them for cleaning.

3. Fuel injector is blocked: The fuel injector of the EFI vehicle is a key component of automobile fuel injection, and the service life is very long, which can reach hundreds of thousands of kilometers. However, because the gasoline has a rubber ruler, it will block the fuel injection hole of the fuel injector, so the fuel injection amount of each fuel injector is inconsistent, resulting in the inconsistent work of each cylinder and causing the engine to shake.

The solution is to remove it and clean it.

4. The water temperature is abnormal: the engine working temperature has a normal range, and the water temperature will be high.

The ignition time becomes earlier, the oil-oil mixing ratio changes, the oil viscosity becomes thinner, and the lubrication performance deteriorates. The general cause of failure is the lack of antifreeze.

The shake caused by the thermostat not opening, the fan not turning, and the temperature of the temperature control switch is not accurate, the above troubleshooting can be solved.

5. Low idle speed: The engine idle speed value has been set in the computer, and when the number of revolutions is low to a certain range, the car computer will automatically adjust it. If the idle speed is too low and the jitter is beyond the control of the computer, some cars have adjusting screws on the throttle to adjust the idle speed, while some cars can not be adjusted, this kind of car can check the idle valve, throttle, air flow meter, vacuum degree Nian Zhen.

Sensors and adjustment of ignition time (for cars with distributors) can increase idling speed. Low idle speed can occur even when the water temperature is low, so you can check and replace the thermostat.

The car idle speed of the original 800 suddenly changed to 1000, which may be due to warm-up, high torque interference and so on.

After the car is started, the idle speed may indeed change from 800 to 1000 due to warm-up, high torque interference, etc. Under the speed condition, the gasoline engine is subject to many external interference torques, including the interference of small torques such as power windows and electric heating seats, as well as the interference of large moments such as steering power and on-board air conditioning.

In the event of a small torque disturbance, the ECU will automatically control the air intake of the idle bypass valve through the motor to maintain the engine speed around the target speed. When it encounters a high torque interference, the engine will increase the idle speed to stabilize the idle state. It's like we used to have classes, and we get a lot of interruptions.

Cars

In 1680, the famous British scientist Isaac Newton conceived the scheme of jet cars, using nozzles to spray steam to propel the car, but it was not made into a physical object. In 1769, the Frenchman N.J. Günyu built a three-wheeled automobile powered by steam from the combustion of coal gas. But the speed of such a car is only 4 kilometers per hour.

And every 15 minutes, you have to stop to fill the boiler with coal, which is very troublesome. Later, the car crashed into a brick wall during a march and shattered the collision. In 1879, the German engineer Karlbenz successfully tested a two-stroke experimental engine for the first time.

1.Oil Generally speaking, oil consumption is not severe enough to get through the cycle between maintenances, but in the summer due to the hot weather, oil consumption will be a little higher than usual. If it is found that there are impurities or gasoline smell in the engine oil during the daily inspection, and the exhaust smoke is light blue, it means that there is a problem with the engine, and the parts may be abnormally worn, so you should enter the factory for maintenance as soon as possible.

2.Transmission fluid.

When you change your engine oil, you can check your transmission oil by the way, and since the inspection process is more cumbersome, you can ask the dealer's service department to handle it. In order to measure accurately, the car must be discharged into neutral p, run at idle speed, and parked on a flat place, and the oil must run to an operating temperature of 80 93.

3.Too much or too little oil can damage the gearbox, and too much oil may cause excessive resistance to the operation of the parts, or cause the transmission oil to bubble and deteriorate, resulting in abnormal wear and tear of the parts. So when you check your transmission fluid, it's important to measure accurately.

4.Power steering oil.

When the engine cools down, wipe the top of the oil filler cap and the oil reservoir clean, then unscrew out the direction oil cap, and wipe the dipstick clean with a fiber-free clean paper towel, and then install the lock, and then open and pull out the oil level to check the dipstick.

To fill or change the oil, it is necessary to use the correct power steering oil, if it is not used properly, it will cause damage to the steering machine.

5.Brake fluid.

Just open the hood and look at the level of the brake oil can, as long as it is not lower than the lower limit.

When the level of brake fluid is not checked, brake fluid should not be added, so as not to add too much, and the brake oil will be sprayed to the high-temperature engine, resulting in corrosion and even combustion. If there are bubbles in the brake oil, or the oil becomes dirty, it means that the brake fluid has deteriorated, please replace it as soon as possible, so as not to reduce the boiling point of the brake fluid and produce bubbles, resulting in poor braking effect, which is very prone to danger.