Ignite the cold car twice and ask what the reason is

There are many reasons why it takes two ignitions to be successful, the biggest possibility is that because the temperature is extremely low, the gasoline atomization in the cylinder is very unsatisfactory, so it will not be possible to ignite successfully at one time, and it will take twice. At this time, you must not be in a hurry, do not panic, this is all a phenomenon of this time. Do not attempt to ignite for a long time at a time, as this will damage the ignition equipment of the engine.

The correct thing to do is not to ignite for more than 5 seconds each time, and if it is not successful once, wait a few seconds and ignite again. If, however, the ignition problem is not resolved after the weather warms up, and there is no fault light reminder, then there may be a problem with the gasoline pump or the intake and exhaust.

Insufficient pressure of the gasoline pump will cause the gasoline to be unable to be transferred to the engine normally, affecting the normal start. In the case of intake or exhaust air, there is a possibility of carbon deposit.

or foreign matter blockage, resulting in unsmooth air intake or outlet, affecting the normal operation of the engine. If these situations occur, please go to a 4S shop or professional repair shop in time to deal with them to avoid damage to the engine.

Generally, the car will maintain a certain oil pressure after the ignition, which is convenient for the next start, if the check valve is relieved, it will lead to no residual pressure in the oil pressure, when the cold car starts, the first time the pressure is not enough, and the second start, the start is normal, There can be a way to verify, before the cold car starts, open the key door to the instrument light is fully on, but do not get on the car, close the key door, start the vehicle again, if the smooth start is to relieve the pressure, the oil pump is powered on and starts to pump oil for about 2-3 seconds, This is to provide the injection pressure required to start the engine. If the ignition does not stay in the ON position but directly unscrews the key and the electric fire is opened, the oil pressure does not reach the normal pressure when the starter starts to rotate, but this does not matter, because the oil pump is already working at this time, and the oil pressure is normal in less than a second at intervals, so the vehicle can also be started in this way. However, if your car won't start, it's likely that the fuel filter is too dirty, making it difficult for the pressure of the oil pump to reach the engine injectors.

Based on the phenomenon you described, I think there is nothing wrong with your car, which is the reason for the low temperature. You start the car according to the following methods to see if there is still the phenomenon you said: 1. Before starting the car, press the accelerator pedal a few times before starting; 1. After the engine starts, do not fix the accelerator pedal in one position, but ask you to move the accelerator pedal in time according to the working condition of the engine; 3. Preheat for 10 minutes before starting.

The check valve of the oil pump is relieved.

Generally, the car will maintain a certain oil pressure after the ignition, which is convenient for the next start, if the check valve is relieved, it will lead to no residual pressure in the oil pressure, when the cold car starts, the first time the pressure is not enough, the second start, the start is normal, there can be a method to verify, before the cold car starts, open the key door to the instrument light is fully on, but do not hit the car, close the key door, start the vehicle again, if the smooth start is to relieve the pressure.

This may be due to the high viscosity of the engine oil or poor atomization of gasoline, which is due to a faulty injector problem. When this happens, the injector should be replaced and the ignition system should be checked to see if it is working properly. When adding engine oil, you must also choose the type of engine oil that is suitable for your car engine.

Engine Oil Precautions:

Engine oil is basically an item that every car owner will come into contact with, engine oil is called the blood of the engine, if there is no engine oil in the engine, the engine will not be able to operate normally.

Engine oil not only plays a role in lubrication in the engine, but also plays a role in cleaning, sealing, buffering, rust prevention and heat dissipation.

When the engine is running, the engine oil can form an oil film on the surface of each component in the engine, which can avoid friction caused by direct contact between the various parts in the engine.

The water temperature sensor plug is loose, just plug it in. If it is not loose, it means that the water temperature sensor is damaged, and it is good to replace it with a new one. It is recommended that you go to the repair shop and let the master take a look!

There are many reasons for this problem, and it also depends on how many kilometers your car has run.

1. Remove the spark plug and check to see if it needs to be cleaned or replaced;

2. Check whether the fuel injector has carbon deposits and clean it, if it is time for maintenance, it should be maintained;

3. There is also a possibility that the water temperature sensor cold car signal error (the fault can be found with the detection computer **) cold car can not start most of the cases is caused by too much carbon deposit, it is recommended to use high-grade synthetic engine oil after maintenance and repair, high-quality engine lubricating oil has the advantages of anti-aging and high temperature resistance, so it is not easy to produce carbon deposits. Hope it helps.

Some cars need to be ignited 3 to 4 times before they can be successfully started, because the fuel in the fuel pipe flows into the fuel tank after the vehicle is parked overnight. When checking, be sure to check the connection of the fuel tank and whether the ignition is turned on. During this process, be careful not to park the car outside at night, because it is very likely to cause this problem after the overnight stay.

When the car is not in use at night, it is best to drive the car to the garage to prevent movement. It is necessary to carry out a comprehensive inspection of the car before driving, only in this way can it be guaranteed that there will be no certain breakdowns. <>

There will be carbon canister solenoid valves in cars.

In the event of a malfunction, electrical equipment will be controlled in a closed loop. Whether the vehicle is started in the morning or at night, it is important to check the fusion of fuel and air. If there is a problem with the electrical power of the canister solenoid valve, the engine will not be able to burn.

In this process, it is necessary to turn on the fire repeatedly, and it takes up to 4 times before it can be opened. Start by turning on the check mode to see what the problems are in the car. If there is, send it for repair in time, and don't wait for the car to have a problem before going to the pants to think about it late.

When the oil pressure of the car is unstable, it may also cause the car to fail to operate when it is on fire. You can choose not to light the fire in the car, and use the car key to turn on and off three times in a row. After a few seconds at a time, the oil pressure is able to ignite successfully.

Pure sleepiness can sometimes be caused by carbon deposits in the car.

At this time, it is necessary to clean it in time. If there are more cases, then you have to go to the 4S store to solve this problem. Be sure to pay attention to the oil pressure, because if you don't pay attention at that time, you may be prone to problems in the middle of the road. <>

In general, it is important to stay calm when driving, no matter what kind of problems you encounter. The car should be maintained every once in a while, otherwise there may be some breakdowns while driving. In the process of changing the oil, it is necessary to use the oil that matches the car, so as not to damage the car.

It may be that the spark plug is blocked, the throttle is too dirty, and the oil pressure is not enough, which will lead to the need for repeated ignition, and you can change to a gasoline with a higher oil level.

If there is a problem with the spark plug, check the spark plug, it may also be caused by insufficient cylinder pressure, and you need to pay attention to maintenance.

This could be due to the vehicle's carbon deposits, a faulty sensor for water temperature, or a lack of cylinder pressure, as well as an associated electrical failure.

The reason why the cold car is not good for ignition:

1. The car has carbon deposits.

There is a large amount of carbon deposits in the cylinder and on the intake valve, and the carbon deposits will absorb some of the gasoline vapor during ignition, resulting in a decrease in the concentration of the mixture and making it difficult to start. Continue to fire and spray more oil, or hit it two or three times and you're good to go. When the vehicle starts cool, it needs a relatively thick mixture, and there is a state of starting and thickening, and more gasoline is sprayed when starting, and the mixture is more conducive to the car.

2. The battery storage is insufficient.

The battery storage capacity is closely related to the temperature, and the lower the temperature, the worse the battery performance. The battery of many cars is used well in summer, and there is a loss of power in winter, which means that the battery life is up, and the battery needs to be replaced. When the storage power is low, the starter will run weakly and the ignition will not be smooth.

3. The gasoline pump is damaged.

The gasoline pump does not work, and without gasoline entering the cylinder, it naturally cannot ignite and cannot work properly. The life of the gasoline pump is longer, and generally the car is more than 5 years old, which can be considered as a problem with the gasoline pump. The way to check if the petrol pump is damaged is as simple as pressing the oil pressure check port on the petrol track to see if there is any gasoline spraying, or connect the gasoline pressure gauge.

Check the oil pressure.

4. The ignition coil is damaged.

It refers to the integral ignition coil, and after it is broken, each cylinder cannot be ignited, so it cannot be ignited. The kind of one that has an ignition coil for each cylinder, and the broken one can also ignite, but the shaking is more serious.

If the throttle does not ignite even if it is added, carbon deposits and throttle are excluded.

The next step is to check the oil circuit and circuit. If the oil circuit and circuit are also normal, then a certain sensor is faulty, and the following two sensors are commonly affected by ignition.

5. Crankshaft position sensor.

If the sensor is broken, it will not detect the rotation of the crankshaft, and the engine computer will not know that you are igniting, so it will not control the fuel injector for fuel injection, and naturally it will not be able to land the car.

6. Water temperature sensor.

If the water temperature sensor is damaged, the signal to the computer is that the water temperature is very low, dozens of degrees below zero. Then the engine computer will increase the amount of fuel injected when the ignition is ignited, causing the mixture to be too thick to hit the car. Of course, this situation does not occur much, in fact, the sensor is broken, it will generally show a fixed temperature, but the temperature is not so low, so it does not affect the ignition.

Summary. The cold car starts normally, and the hot car is difficult to start after the ignition, which is a more common fault phenomenon, and most of them are basically sensor problems.

If the dashboard lights up the fault problem, you can directly use the diagnostic computer to read the fault code and quickly determine the cause of the fault. If there is no fault code, focus on the inlet pressure sensor, or the air flow sensor.

The cold car starts normally, and the hot car is difficult to start after the ignition, which is a more common fault phenomenon, and most of them are basically sensor problems. If the dashboard lights up the fault problem, you can directly use the diagnostic computer to read the fault code and quickly determine the cause of the fault. If there is no fault code, focus on the inlet pressure sensor, or the air flow sensor.

The cold car starts normally, the engine rotates normally, and the fault problems of spark plugs, ignition coils, and fuel injection systems can be eliminated. It is not easy to start the hot car after the engine is turned off, most of the problems are due to the failure of the intake pressure sensor, and the old car may be the air flow sensor. This sensor is one of the main signals to regulate and correct the amount of fuel injected, if there is a fault problem that will affect the wrong amount of fuel injection in the car, the mixture is too thin or too concentrated.

There is also a situation, if the car starts normally when it is cold, but after being exposed to the outdoor sun for a period of time in summer, it is difficult to start, and it needs to be ignited two or three times. Most of them are due to the fact that the solenoid valve of the canister is not closed tightly, which affects the gasoline vapor entering the combustion chamber, and the mixed gas is too concentrated to start.

In 07, the old LaCrosse car has driven 300,000 yuan, the exhaust emission is up to standard, the fuel consumption is normal, and the acceleration is normal. At present, the fuel injector, spark plug, high-pressure bag, inlet flow sensor, carbon canister solenoid valve, crankshaft position sensor, and water temperature sensor have been replaced, and the fault has not been solved.

The starter motor was also replaced.

You're almost no problem with this, everything that should be changed has been changed.

At the moment, the fuel pump has not been replaced.

I looked for a few maintenance masters, but I couldn't find out why.

Try to change the fuel pump, and several masters can't find the reason, so they can only change it.

Thank you. You're welcome, dear.

I've already given it five stars, and I like it too.

Okay, thank you for kissing.

This winter is relatively cold, it is not easy to heat up, in fact, it will be a few seconds late, sometimes it can't be played for several minutes, which is also normal, because the fuel of the car will condense in the case of special coldAt this time, the spark plug has no way to ignite the fuel quickly, and the car engine cannot produce heat if it cannot ignite, so it will cause a vicious circle. <>

In the past, the old car, in the last century, there would be no fire in winter, so the car basically had to prepare a garage and put it in a similar indoor environment. But now it's different, now the car has antifreeze, even if it's cold outside, the car is not, it will delay for a while, and it won't say that there is no fire, antifreeze can indeed avoid the car's engine fuel and oil frozen, but it can't completely solve the problem of low temperature that is not easy to ignite, this problem will inevitably appear, and it is normal. <>

If you build a garage in your own home, then all around are closed, even if it is colder in winter, the garage will not be particularly cold, and it will not affect the normal ignition of the car. If there is no underground garage in the community is open-air, then the car may be more test of performance, because some cars add better antifreeze, the performance of the car itself is better, it is not easy to appear that it cannot catch fire, and some are not able to catch fire, especially cold on the nest. For example, in some Northeast regions, when it reaches minus 30 degrees Celsius and minus 40 degrees, many cars cannot catch fire, and they are afraid of freezing nests, which is real, and it will occur several times a year in winter.

As long as the area of their death is not the Northeast region, there is basically no colder place in our country than the Northeast region, and after the winter, it will reach more than 10 degrees below zero and more than 20 degrees below zero, which does not affect the normal use of the car, because this temperature is within the protection range of antifreeze. But if it comes to minus 40 degrees, then the effect of these antifreeze is very limited, although it is added, but it cannot guarantee the normal use of the car.