Peugeot 207 cold car idle unstable! It s better during the day on a hot day! What s going on?

Most of the cold start jitter is caused by poor fuel combustion, the fuel tank has more gum moisture, too much carbon deposition inside the engine, and the cold start is not brought to the combustion chamber and then mixed in the fuel tank is driven into the combustion chamber, and the jitter caused by poor combustion. The gasoline emitted by the cold start injector will be absorbed by carbon deposits, resulting in a dilute mixture for the cold start, which makes the start jitter.

The most fundamental reason for the shaking phenomenon of cold start or waiting in neutral is poor combustion in the cylinder. If the combustion is not good, the power provided by the car will not be enough, and the car will shake.

Causes of idle jitter:

1. The engine has serious carbon deposits. The most common cause of idle judder is excessive carbon build-up on the throttle or injector. When there is too much carbon deposit inside the engine, the gasoline sprayed by the fuel injector during cold start will be absorbed by the carbon deposit, resulting in a mixture that is too thin and making it difficult to start.

After landing, the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the engine and burned, which will thicken the mixture. The mixture is sometimes dilute and sometimes thick, which will cause idle jitter after cold start. The lower the temperature, the greater the amount of oil required for cold starts, and the more the presence of carbon deposits affects cold starts.

The solution is to clean the carbon deposits at the throttle and injector.

2. Poor ignition system and poor ignition of spark plugs will also lead to engine idling and shaking. If there is a problem, check if the ignition system is faulty and if there is too much carbon deposited in the spark plug.

3. The oil pressure is unstable. If you have cleaned the engine carbon deposits, cleaned the throttle valve or replaced the spark plug, and there is still the problem of body shaking when idling, it is recommended to go to the 4S shop to check whether the fuel supply pressure and intake pressure sensor are normal. If the oil pump supply pressure is not normal or the intake pressure sensor is incorrect, it can also cause the body to shake when idling.

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.

If the engine is unstable and easy to stall when the engine is running cold, but the idle operation is basically normal after the hot car, the reasons are usually as follows: 1) The additional air valve is not opened or the opening is too small when the engine is cold, so that the idle speed of the engine is too low when the car is cold, resulting in unstable idling. 2) When the engine is cold, the idle control valve is faulty, and the opening is too small, so that the idle speed is too low when the engine is cold, resulting in unstable idling.

3) The water temperature sensor is faulty, so that the engine computer does not increase the idle speed and thicken the mixture according to the engine temperature when the car is cold, resulting in unstable idling. 4) The atomization of the injector is poor or partially blocked, which makes the quality of the mixture deteriorate or the amount of fuel injected is too small under the idle condition of the cold car, resulting in too thin the mixture and causing unstable idling.

It should be that the throttle has not been cleaned for a long time. It's a little dirty.

Engine cylinder shortage phenomenon, gasoline, carbon deposits, spark plugs, ignition coils are possible, or test to see if there is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

The common problem of Peugeot cars is that the ignition coil is easy to break, resulting in poor ignition. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

If the idle speed is unstable, you should first check the stepper motor, and you should check the spark plug, high-voltage wire and ignition coil when you say the sharp jitter.

Hello, it is recommended to check the oil pressure problem, ignition problem, change the gasoline filter element, spark plug, wash the throttle and try to try I hope my answer can help you I wish you a happy car!! [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello, this situation is mainly caused by carbon deposits in the engine, it is recommended that you go to the repair shop to clean the carbon deposits on the throttle valve quietly.

Thanks for using, I hope mine can help you, it would be great if I could help you!

If you don't understand something, feel free to ask, and I will give you a satisfactory answer!

Hello, I am your exclusive technician, attentive, careful, concentrate on answering your car questions, for you to find the corresponding problem solutions and solutions, the reasons for this problem are as follows, 1 throttle stuck, if you step on the accelerator, the throttle return is not normal will appear such a situation, the middle world suggests that you can clean the throttle, and then try to rub it, 2 engine intake and exhaust system has air leakage beam Peiyan phenomenon, this problem occurs, The abnormal air-fuel ratio of the engine will also cause the engine idle speed to rise, and the intake air flow sensor or the intake pressure sensor will fail.

Pacific Automobile Network] Peugeot 207 idle unstable sometimes can't add oil reasons: 1. Too much carbon deposition in the air flow of the throttle and air intake block. 2. The throttle motor is damaged.

3. The air intake is inaccurate. 4. The carburetor is blocked. 5. The engine lacks cylinders.

6. Air intake pipe leakage.

Idle instability is manifested as engine shaking and uneven speed when idling. The reasons for this are:

The idle air volume hole is blocked, the idle device is not working well, the spark plug spark of individual cylinders is too weak, the leakage of individual valve stoves is not tight, the air intake manifold bench is changed to air leakage, the ignition time is too early or too late, and the idle speed adjustment is improper. When the engine is unstable at idle, the idle speed should be adjusted first, if the fault cannot be eliminated after the idle speed adjustment, the idle speed measuring hole and the idle air measuring hole should be checked to see if it is blocked, if the measuring hole is blocked, it can be cleaned with gasoline or acetone and blown through with coarse compressed air; If the measuring hole is not blocked, the engine speed should be stabilized at a certain speed, and whether there is air leakage in the intake manifold or carburetor or the lower gasket. If the idle speed is unstable and accompanied by the decrease of engine power, the working condition of the spark plug, the sealing performance of the valve and the ignition time should be further checked, and the maintenance and adjustment should be carried out if necessary.

An engine is a machine that can convert other forms of energy into mechanical energy, such as internal combustion engines (gasoline engines, etc.), external combustion engines (Stirling engines, steam engines, etc.), electric motors, etc. For example, the internal combustion engine usually converts chemical energy into mechanical energy. An engine applies to both a power generation unit and an entire machine including a power unit (e.g

gasoline engines, aero engines). The engine was first born in the United Kingdom, so the concept of engine also comes from English, and its original meaning refers to that"A mechanism that generates power"。

Photo by Pacific Automobile Network Q&A).

Hello! Clean the throttle, check the spark plug, the steel wire, the ignition coil, and the general idle jitter is all I hope it can help you [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, you said that the acceleration is powerful, and you can basically rule out the problem of ignition and oil, first clean the lower throttle and see, [If there is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

It should be that the throttle has too much carbon deposit, and the throttle should be cleaned. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello, there are many reasons for idle shaking, it is recommended that you clean the throttle injector, check the oil pressure, check the spark plug cylinder line, these basic [car problems, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

This is absolutely not normal, and there are several main reasons for the jitter:

1.It is caused by impurities and foreign bodies in the air inlet compartment.

2.Improper engine oil or gasoline;

3.The ignition washer is not working properly;

4.Carbon build-up in the engine.

5.The throttle initialization is not done well, or there is a problem with the throttle itself6The ignition advance angle was not well controlled.