Toyota Corolla idling unstable after ignition

The main cause of unstable and jitter at idling;

1. The most common cause of vehicle shaking is that the throttle is too dirty or the fuel injector has too much carbon.

2. When the carbon deposition inside the engine is too much, the gasoline sprayed by the cold start fuel injector will be absorbed by a large amount of carbon deposition, resulting in the mixture of cold start being too thin, making it difficult to start, in this case, only when the gasoline absorbed by carbon deposition is saturated, it is easy to get started, 3. After the car is adsorbed, the gasoline adsorbed on the carbon deposition will be sucked into the cylinder by the vacuum suction of the engine for combustion, and the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, resulting in idle shaking after cold start. The lower the temperature, the greater the amount of oil required for the cold start, and the more carbon deposits will affect the smooth cold start.

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

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.

Totally normal! To give you the most formal way of saying: the engine needs to be warmed up when it starts cold. Depending on the temperature, the warm-up time usually varies from 2-5 minutes, but it should not exceed 5 minutes, otherwise it will really cause idle problems.

Many friends warm up for a minute or two, hang on low gear and walk slowly for two minutes before accelerating.

In many places in China, the road surface is very dusty, which has a great impact on the electronic throttle, and it is generally necessary to clean it regularly.

If you have time to run more 4S shops, or participate in some car clubs, you can learn a lot. Now in driving school, in addition to learning a few tricks of non-standard handlebar style, I really can't learn a little mechanical common sense.

Wishing you a safe drive and a happy day!

The cause of unstable and shaky car idling.

1: Jitter due to inappropriate mixing ratio.

If the oil-gas mixing ratio in the engine compartment of the car is not adjusted accurately, the car will easily shake. In a closed-loop controlled car, the minimum operating temperature of the oxygen sensor is 370 degrees Celsius, and if the car is just started, the oxygen sensor does not work because the temperature in the exhaust pipe does not reach 370 degrees Celsius. At this time, the ECU misjudges, and the control of the oil and gas mixing and ignition time through the actuator has an error, thereby reducing the power output of the car and causing shaking.

2: Low ignition energy leads to jitter.

The first problem faced by the car when it starts cold is low temperature, the temperature in the engine is not enough, and the temperature of fuel and lubricating oil is not enough, so more fuel should be injected to meet the requirements of power during cold start. The greater the gap between the spark plugs, the smaller the ignition energy. When the fuel atomization is not good at low temperature, the fuel needs higher ignition energy, and the ignition gap of the spark plug is easy to become larger when the car is used for a long time, resulting in a decrease in ignition energy, which affects the dynamics and makes the car shake.

In addition, the ignition energy can also be reduced due to the aging of the ignition coil, the aging of the high-voltage wire of the spark plug, or the leakage of electricity.

Bad oil, poor spark plug work, and clogged fuel injector are all possible.

The tachometer fluctuation is caused by unstable idle speed and poor combustion, so you can directly use Si Youpu to clean the oil circuit, and the car will be very smooth after running a tank of fuel, which is how I do my own car.

Check the spark plugs, clean the throttle and see if there is any air leakage in the intake.

Causes of unstable car idling.

1. Air leakage from the intake manifold.

When the air that should not be entered, gasoline vapor, and combustion exhaust gas enter the intake manifold, the mixture is too thick or too thin, causing the car to idle unsteadily.

2. Too much carbon deposition on the throttle.

Excessive carbon deposition in the throttle valve and surrounding air intakes, and changes in the cross-sectional area of the air channel, make it impossible for the control unit to accurately control the amount of air intake at idle, which will also lead to too thick or too thin mixture, resulting in unstable idling of the car.

3. Failure of the actuator of the air intake system.

There are many actuators in the engine intake system, such as throttle motors, idle stepper motors, duty cycle solenoid valves, air flow meters, intake pressure sensors, etc., which cause the car to idle unstable.

4. Fuel system failure.

Faults such as clogged injectors, clogged fuel filters, clogged fuel pump filters, faulty fuel pressure regulators, and clogged return pipes can all lead to incorrect fuel injection, resulting in over-concentrated or over-thin mixtures, resulting in unstable car idling.

5. Ignition system failure.

Faults such as ignition module failure, incorrect spark plug clearance, spark plug electrode ablation or damage, and excessive resistance of the high-voltage line lead to a decrease in ignition spark energy or misfire, resulting in unstable idling of the car.

There are many reasons for unstable idling, and we can start with the simplest of things!

1.Remove the air filter by yourself, and if the dirt is seriously blocked, replace it, and knock it if you don't do much!

2.Remove the intake hose yourself, check if there is carbon deposit on the throttle, and if so, go to the garage to clean the carbon deposit in the intake system!

3.Go to the garage to remove the spark plug, if the spark plug electrode is rust red, it means that the engine cylinder is fully burned! If it is whitish or black, there is a problem, and you need to replace the spark plug or check if there is a problem with the ignition coil!

4.Go to the garage to check if the fuel pressure is normal! Insufficient oil supply can also cause idle jitter!

Hello subject! There are many reasons why idle speed is unstable! I suggest you start with the simplicity! For example, wash the throttle! Or take a look at the air intake system! Hope it helps.

Engine idle instability refers to the change of gas force in the cylinder, which causes the power imbalance of each cylinder, resulting in the inconsistent horizontal component of each piston during the power stroke, and the torque imbalance of the engine lateral rocking, resulting in engine shaking.

Hello, there are several reasons for the unstable speed: 1. The air intake system is poorly sealed; 2. Clean the fuel injector of the throttle valve; 3. The oxygen sensor and ignition coil do not work well; Fourth, the negative wire of the computer is loose; 5. Temporary failure of air flow meter; Sixth, other The most common and least common, I have listed them for the landlord, and the landlord had better go to the 4S shop to check the carbon canister is to decompress the fuel tank. There are two vacuum tubes, one for the oil tank and the other for the carburetor.

The tube connected to the carburetor is probably installed incorrectly, so don't install it in a place with suction. Otherwise, Yanshan will be unstable or have oil leakage. Zhao Wenhua, an expert from Beiyuan Toyota, is at your service:

First of all, it is normal for us to have a high idle speed of Toyota cool cars, and the idle speed is automatically adjusted by the computer. In addition, the Corolla has this phenomenon of idle speed change when shifting. It should be normal.

It is recommended that you use the internal circulation when driving to avoid odors in the car, and it is recommended to clean the air duct or evaporation tank regularly if the odor occurs when the air conditioner or heater is turned on, which may be due to the dirty air duct. @2019

The idling speed of the self-priming car is not stable, and the problem of air intake is generally considered, mainly in the air intake filter element and the solar saving Bu Na Men Nian Bad Chong first checked. A lot of people say, that's someone else, yes, you need to upgrade the ECU

Causes of jitter at idle:

1.The engine has serious carbon deposits.

The most common cause of car shake is a dirty throttle or excessive carbon build-up in the fuel injector. When the carbon deposit inside the engine is too much, the gasoline sprayed out by the cold start fuel injection head will be absorbed by the carbon deposit in large quantities, resulting in the mixture of cold start being too thin, making it difficult to start, in this case, only when the gasoline absorbed by the carbon deposit is saturated, it is easy to get on the car, and the gasoline adsorbed on the carbon deposit after the car will be sucked into the cylinder by the vacuum suction of the engine for combustion, and the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, causing idle shaking after cold start.

2.Problems with the ignition system.

Check the working condition of the spark plug, high-voltage wire and ignition coil, the ignition system and spark plug are not working well, and the poor working condition of the ignition system and spark plug will also lead to this kind of failure.

3.The oil pressure is unstable.

If you have cleaned the engine carbon deposit, washed the throttle, replaced the spark plug, etc., and still found that the body shakes when idling, it is recommended to check whether the fuel supply pressure and intake pressure sensor are normal.

Solution; The best way is to clean the oil circuit, clean it regularly, and use PNF fuel additives to solve the problems caused by the above-mentioned accumulation of silver carbon. 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 slurry of the oil circuit, which will continue to pollute the fresh fuel, resulting in no good fuel to participate in the combustion in the later stage, and the carbon deposition exceeds the standard, which is especially common for the National VI car. We can only gradually alleviate most of the problems by maintaining clean oil circuits.

The causes of unstable Corolla idling are: leakage in the intake manifold or various valves, excessive dirt build-up in the throttle and intake tract, injector failure, fuel pressure failure, ignition module and ignition coil failure, or spark plug and finch line failure. Taking the 2021 Corolla Pioneer Code Plus Edition as an example, its body adopts a 4-door and 5-seat sedan structure, with a maximum speed of 180km per hour, a minimum ground clearance of 152mm, and a fuel tank volume of 50L.

In terms of power, the 2021 Corolla Pioneer Plus Edition is equipped with a turbocharged engine with a 10:1 engine compression ratio, an aluminum alloy structure for the body, and a continuously variable transmission for the transmission system.

Hello, there are the following reasons for the instability of the car's potato: 1. The air intake system is poorly sealed; 2. Clean the fuel injector of the throttle valve; 3. The oxygen sensor and ignition coil do not work well; Fourth, the negative wire of the computer is loose; 5. Temporary failure of air flow meter; Sixth, other The most common and least common, I have listed them for the landlord, and the landlord had better go to the 4S shop to check the carbon canister is to decompress the fuel tank. There are two vacuum tubes, one for the oil tank and the other for the carburetor.

The tube of the carburetor is misinstalled, and it should not be installed in a place with suction. Otherwise, there will be unstable idling or oil leakage.

Does the subject want to ask, "What is the reason why the Toyota Douju Corolla idles for 1,500 revolutions and is still running up and down"? 1. The most common reason for car shaking caused by serious carbon deposition in the engine is that the throttle is too dirty or the fuel injector is too much carbon. When there is too much carbon deposition inside the engine, the gasoline emitted from the fuel injector head of the cold car will be absorbed by the carbon deposit, resulting in the mixture of cold car starting being too thin, making it difficult to start.

2. Check the working condition of the spark plug, high-voltage air noise wire and ignition coil for ignition system problems, the ignition system is not working well, and the spark plug jumping condition is not good, which will also cause this kind of fault phenomenon.

3. If the oil pressure is unstable, if you have cleaned the engine carbon deposits, washed the throttle, changed the oil cushion and spark plug, etc., and still found that the body shakes when idling, it is recommended that you 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 abnormal or the intake pressure sensor value is wrong and the work is poor, it will cause the body to shake.

4. The aging of engine parts and the shaking of automobiles are also related to the aging of engine feet.

Lao Tie, mine is also lighter 2200 rpm, hot car air conditioner 1600 rpm, off air conditioner 1500 rpm, have you solved it, what is the problem?

The causes of unstable Corolla idling are: leakage of the intake manifold or various valves, excessive fouling of the throttle and intake tract, injector failure, fuel pressure failure, ignition module and ignition coil failure, or spark plug and high-voltage line failure. Taking the 2017 facelifted manual GL of the Corolla as an example, its body adopts a four-door, five-seat sedan structure, with a minimum ground clearance of 145mm and a fuel tank volume of 55L.

In terms of power, the 2017 facelifted manual GL of the Corolla is equipped with a naturally suction Zheng Jingfan gas engine, the engine compression ratio is 1, the body is made of aluminum alloy, and the transmission system is matched with a 5-speed manual gearbox.