Why did the Buick Luzun idle and shake and misfire

The cause of "carbon deposition" should not be underestimated, which will cause insufficient combustion of gasoline and cause the engine to shake. The impact of engine carbon deposition on the car is quite large, first of all, to reduce the engine power, that is, to make the power output uneven and gradually decay, in other words, more and more powerless. The second is to increase fuel consumption and increase your financial burden.

The third is the difficulty of cold start, that is, the difficulty of ignition, it is not easy to get on the car, and finally the carbon deposit in the combustion chamber is strict, and a heavy one will also cause cylinder detonation, and there will be a sound of low-speed acceleration, which will cause damage to the piston and crankshaft, and cause high temperature of the engine, which will seriously affect the safety of the car. Then there is the excessive discharge, which not only fails the annual inspection and inspection, but also directly aggravates the harm of polluting the environment.

There is another reason: the throttle valve is faulty. Both of these problems can cause engine shake and unstable speed.

There are generally several situations in the fault diagnosis of engine idle shake, the most common reason for the serious formation of car shake by engine carbon deposition is that there is a general cleaning agent inside the engine, which can remove carbon deposition without disassembling the oil to clean the carbon sludge, which is very convenient to use, and the suspension differentiation is not blocked, and the oil is miscible together and will not lead to delamination, better and safer cleaning of your engine.

Why did Buick Luzun idle shake and misfire The fuel injection of the cold car was insufficient, and the shaking disappeared after stepping on the accelerator because the increased fuel injection covered up the previous problem. If the cold car shakes, it is caused by poor combustion. For a variety of reasons, we can troubleshoot accessories after acceleration.

The key is to clean the lower oil circuit, if the oil circuit is dirty, it will cause it to shake if it burns badly. You can add 2 China VI standard fuel additives to the fuel tank + have & Pu, this kind of detergent, after running a tank of fuel, this problem will disappear. Another thing to note is that it is best not to go to the gas station to refuel for 10 days before the underground oil storage tank is about to be cleaned, and the dirty impurities before cleaning are added to the car.

Therefore, private cars must clean the oil circuit, and cleaning the oil circuit is not equal to carbon deposit.

Check the engine system, check the ignition system, check the air flow meter, check the oil system, check the fuel pressure, check the fuel filter, check the exhaust system, check the cooling system, check the air filter, check the air pressure sensor, check the intake manifold, check the throttle, check the gasoline injector, check the gasoline pump, check the battery voltage, check the spark plug, check the catalytic converter, check the exhaust pipe, etc.

The 06 Buick Luzun starts normally, starts at speed, and then turns off.

Check the engine system, check the ignition system, check the air flow meter, check the oil system, check the fuel pressure, check the fuel filter, check the exhaust system, check the cooling system, check the air filter, check the air pressure transmitter flutter sensor, check the intake manifold, check the hole check the throttle, check the gasoline injector, check the gasoline pump, check the battery voltage round, check the spark plug, check the catalytic converter, check the exhaust pipe, etc.

The computer test is normal.

It may be that there is a problem with the oil pump or oil pressure detection switch, it is recommended to check the oil Zen pump and oil pressure detection switch, if the inspection is normal, it is recommended to replace the oil pressure sensor or the oil pump of the sock scale to ensure that the vehicle is normal and good to drive.

The normal use of the air flow meter, and the air pressure sensor, are still the same.

This can be due to a malfunction of the engine, a malfunction of the engine control unit, or a grip on the fuel system. It is recommended to check the engine control unit, fuel system bright rolling system, replace the air filter, check the spark plug, check the exhaust system, etc., to determine the cause of the failure.

The cause of the engine fire and the symptoms of the early occurrence of Zhensun.

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 the running parts and shorten the service life of the 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 will generally be 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.

Possible causes of lack of fire in the engine.

1. The spark plug is faulty, blocked or damaged;

2. There is a problem with the cylinder line;

3. There is a problem with the ignition coil;

4. There is a problem with the fuel injector, which is blocked or the low voltage causes the data loss of the DME internal injector;

5. The mixture has the problem of skin removal; Burning jujubes.

6. There is a problem with the cylinder pressure;

Check that the computer detector shows that the 5 cylinders are lacking fire, indicating that the 5 cylinders are not working well, check the high-pressure bag, spark plugs, fuel injectors and wiring, etc.

Summary. Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, I hope this service can help you. If there is no fault code for Buick Luzun hot car stalling, the following two aspects are mainly considered, one is the failure of the crankshaft position sensor and its line, and the second aspect is the failure of the computer board itself.

The following situations can occur when there is interference or a missing signal from the crankshaft position sensor, or when there is a fault within the computer board itself.

Hello, don't worry, I can ask for your question, but wait a minute, I need text for about 2 minutes.

Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, I hope this service can help you. If there is no fault code when the Buick Luzun hot car stalls in this case, the following two aspects are mainly considered, one is the crankshaft position sensor and its circuit failure, and the second aspect is to consider the failure of the computer board itself. When there is interference in the signal of the position sensor of the cherry shaft before the warp is dry, or the signal is missing, or there is a fault in the computer board itself, the following situations will occur.

Car stalling: There are four main reasons for vehicle stalling: oil circuit, valve, circuit, sensor failure.

1. When the engine is working normally, the oil pump will pump the fuel out of the fuel tank, enter the piping through the filter, and then spray it out from the fuel injector to form an oil-gas mixture. In this process, fuel pumps and injectors are the most likely to fail, followed by clogged filters and oil circuits. Please focus on these two locations.

If necessary, the oil circuit can be cleaned. In order to reduce the occurrence of such situations, it is necessary to add gasoline that meets the label at a regular gas station when refueling, and at the same time add fuel in time, and try not to let the amount of fuel fall below the red line. 2. Throttle blockage.

The throttle valve is undoubtedly the most important component, but it is also the most problematic component. In general, maintenance personnel will consider cleaning the throttle. However, if the flameout problem cannot be completely solved by frequent cleaning of the throttle, it is generally a fault.

In addition, check the vacuum pump to see if the air intake is normal. 3. The ignition of the spark plug is abnormal. Replace the spark plug according to the service life, when the gasoline engine compresses close to the top dead center, the combustible mixture is ignited by the spark plug, so when the spark plug failure "strikes", it will naturally cause the vehicle to stall.

Normally, it is completely solved by replacing the spark plug, and when it is inconvenient to replace, it can also be temporarily solved by cleaning the electrode and adjusting the emergency measures of the electrode length. In addition, insufficient battery voltage, leakage, ignition coil failure, and line failure will lead to poor ignition or flameout. 4. Sensor failure leads to ECU protective oil cut-off.

Check whether the sensors and actuators are working properly, the main sensors are throttle position sensor, oxygen sensor, crankshaft position sensor, etc., you have replaced the crankshaft position sensor, and also detect whether the oxygen sensor is poisoned. Therefore, it is recommended that the landlord go to the 4S store for a comprehensive inspection, focusing on the spark plug, fuel pump, oxygen sensor, and finally computer matching. If my answer is helpful to you, please set it to.

The waiting speed is low or the no-load load is too large! The automatic transmission is different from the traditional clutch when it is not completely separated at idle, no contact, no friction, does not consume power, but drives the torque converter, and many gears in the gearbox are just sliding and do not transmit power, so the automatic transmission consumes more engine power than the manual one at idle, if the automatic transmission, for example, the ATF oil is too dirty, the gear clearance is too small, the ATF oil pump is stuck, anyway, the drag is too large at idle, this phenomenon will occur.

There are strict standards for engine overhaul, and the following is an important "indicator" for engine overhaul, and the engine is going to be overhauled on the surface of these signs.

1.Cylinder pressure difference: The cylinder compression pressure should meet the original design regulations, check that the tachometer and cylinder pressure gauge do not meet the requirements and are unqualified, and the pressure difference between each cylinder is unqualified

The difference between the pressure of each cylinder and the average pressure of each cylinder is not more than 8 measured with a tachometer, cylinder pressure gauge or with an engine comprehensive analyzer (the pressure difference between each cylinder of Yuedong engine that does not meet the standard is unqualified.) When the cylinder pressure of the Yuedong engine is lower than its standard value, there will be serious black smoke.

2.Large fluctuation of idle speed: the engine is stable at idle speed, and its speed meets the original design regulations. The speed fluctuation is not more than 50r min, and the operation test is carried out with the tachometer or measured with the engine comprehensive analyzer.

3.Low power: the maximum power of the engine shall not be lower than 90 of the original design calibration value, and the dynamometer shall be measured according to the relevant regulations.

4.Fuel consumption rate: The minimum fuel consumption rate of the engine shall not be higher than the fuel consumption meter required by the original design.

5.Low torque: the maximum torque of the engine shall not be lower than 90 of the original design calibration value.

Crankshaft position camshaft position sensor problem.

Hello, check the camshaft actuator.