Problems with the car engine, please help a master

The structural form of piston rings, as well as the advantages and disadvantages, it is recommended to take a look at the following articles:

The installation of cylinder head and cylinder gasket will have different requirements according to different design forms. Generally speaking, it should be noted that the cylinder gasket has upper and lower installation requirements, and cannot be reversed; When tightening the cylinder head bolts, be sure to tighten the torque according to the requirements (for example, some design requirements are tightened in order, some are cross-tightened, and some are tightened in stages, be sure to follow the instructions!). Otherwise, the cylinder head may be deformed due to uneven force and water leakage at the cylinder gasket.

Please make it clear before you analyze it, you know. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Engine often encountered failures and solutions: failures.

1) Fault phenomenon: Turn on the ignition switch, turn the ignition switch to the starting position, and the engine cannot start.

2) Possible causes of failure:

a.The engine cannot run or runs too slowly due to the failure of the starting system: the battery energy storage is insufficient, the electrode stack is clamped, or the electrode stack is severely oxidized; The main fuse of the circuit is blown; Ignition switch failure; starter failure; The starting line is broken or the line connector is in poor contact.

b.Ignition system failure: the ignition coil works poorly, producing weak or no high-voltage sparks; Ignition failure; Poor ignition time.

c.Fuel injection system failure: the car has no fuel in the tank; The fuel pump is not working or the pump oil pressure is too low; Tubing leakage and deformation; The circuit breaker relay is disconnected; The fuel pressure regulator is not working well; The fuel filter is too dirty.

d.Air intake system failure: Failure of the idle control valve or its regulating circuit; Idle control valve trachea rupture or joint leakage; The air flow meter is faulty.

Fault. Common engine faults and troubleshooting methods: methods and steps for diagnosing faults.

When the starting gear is engaged, the starter and the engine cannot run, and the fault of the starting system of Liangchangyan should be detected. Firstly, the storage state of the battery and the connection contact state of the pole are detected. If the battery is normal, check the starting line, fuse, and ignition;

Press the throttle to the center position, then start the engine. At this point, if the engine can start, the fault is a fault of the idle control valve and its circuitry or a leak in the intake pipe. If the engine still does not start when the throttle is pressed to the center position, it is necessary to test the next process of fast gearing.

Do a visual inspection. Check the air intake duct for air leakage; Check that all hoses and their fittings are in good condition; Check the crankcase ventilation hose for leaks or breaks;

Detect high-pressure sparks. If the high-voltage spark is abnormal, the high-voltage wire, ignition coil, distributor and electronic igniter should be tested;

Check that the ignition sequence is good;

Check the oil supply status of the oil supply system. When it is confirmed that there is a crack in the fuel tank of the car, check the fuel supply pressure in the fuel line;

Check the ignition timing and firing sequence of each cylinder;

Check the operation of the fuel pump switch installed on the air flow meter;

Check the working condition of the spark plugs of each cylinder;

Detect ignition timing. If the ignition timing is not good, the ignition timing adjustment system should be further tested; b11？Check the power and working status of the ECU to determine whether the ECU is faulty.

If you encounter a problem with the vehicle, I will generally first destroy the 4S shop to repair the pure spare reserve, if it is not handled well, then complain to the manufacturer's customer service, if it still can't solve the vehicle problem, then go to destroy 12315, car quality network and other institutions to complain and protect their rights.

<> "What are the common problems of engine transportation?

1.Wear and tear of components.

The inside of the engine is a very complex mechanical device, and the operation between the metal parts will inevitably produce friction, resulting in high temperature and wear of the metal parts, but choosing the right engine oil and changing the oil regularly can effectively dissipate heat and reduce the wear of the components, and keep the engine "young".

High-quality engine oil has good anti-wear performance and strong oxidation resistance, which can play a good role in protecting the engine, but many imported brand engine oil is high, and the maintenance cost once every six months is a large investment, so many car owners will choose more cost-effective domestic brand engine oil.

2.Carbon accumulation accumulation.

Carbon deposition is a kind of coke substance that appears in high temperature mode due to incomplete combustion of gum in gasoline during the working process of the engine, which is generally attached to valves, combustion chambers, fuel injectors, spark plugs and other parts. Carbon deposition in the engine is inevitable, but we can prevent it in advance by using high-quality engine oil and adding decarburizers to the fuel to avoid cold start difficulties, engine shaking, unstable idling, increased fuel consumption, and excessive exhaust gas caused by excessive carbon deposition.

In addition, adding gasoline to formal channels and cultivating good car habits can also reduce the generation of carbon deposits and "reduce the burden" on the engine.

3.Lack of power.

The causes of insufficient engine power are: excessive carbon deposits, aging of piston rings, poor air intake, engine overheating, etc. Excessive carbon deposition can be removed by adding carbon remover, piston ring aging needs to be replaced in time, poor air intake is mostly caused by long-term use of the air filter is not cleaned in time to cause blockage, and the engine side is cautious of overheating to consider whether there is a problem with the car cooling system.

The cooling system is an important component to maintain the relatively stable temperature of the engine and ensure the normal operation of the engine. The cooling system revolves around the engine, and the coolant (also known as antifreeze) flowing through the cooling pipes is the key to maintaining a relatively balanced temperature. It is very undesirable for some car owners to add coolant to water, or even directly replace coolant with water.

Because the coolant not only has the function of anti-freezing, but also can prevent boiling, anti-corrosion, anti-rust, anti-foam and other functions. So it needs to be used all year round.

This is the fuel filter warning light.

The following is a detailed diagram of the fault lamp of the car dashboard:

Also, a few things about the color of the alarm light:

1. Red warning light.

The red color is easy to understand and represents the vehicle hazard. We need to stop the car as soon as it lights up! Generally for engine, oil, brake and oil alarms!

2. Yellow warning light.

Yellow is like a yellow light, which indicates that there may be problems with our vehicles, and there are safety hazards! If conditions don't allow, you can deal with it later! Such as alarms for batteries, exhausts, lights, etc.!

3 green indicator.

Green can be understood as a functional indicator, mostly for left and right steering and double flash indication and other functional prompts!

4 blue indicator light.

Blue is a reminder indication, such as the high beam of the vehicle is on, indicating an alarm prompt that may cause interference to other drivers!

5 white indicator lights.

The white color is mainly some driving information of the vehicle, such as mileage, current gear display, and so on!

Good wishes.

This is also the first time to see if the antifreeze level has dropped.

Hello, common engine problems are: engine cold jitter; When the engine is idle with a cold start, it is normal for the engine to shake after the hot start. The main reason is that there is too much carbon deposited in the engine.

When the engine starts cold, the gasoline sprayed from the fuel nozzle will be absorbed by carbon deposits, resulting in a diluted mixture during cold start, making it difficult to start. It is easy to get into the car until it is saturated with gasoline adsorbed by carbon deposits. After the car starts, the gasoline adsorbed on the carbon deposits will be re-sucked into the cylinder for combustion, making the mixture thicker, and the combustible mixture of the engine becoming thinner and thicker, causing idle shaking after cold start.

On the other hand, it is caused by lack of fire, mostly caused by faults such as spark plugs and ignition coils. This can be solved by removing carbon deposits from the cylinder or replacing parts. Engine shake:

The engine shakes when idling. There are many reasons why a car is hot idling, the most common being a dead engine. Generally, check the spark plug, ignition coil, fuel injector, oil circuit, whether the exhaust is blocked, whether the fuel label is consistent, whether the engine carbon deposit is removed, whether the accelerator is carbon deposit, whether the engine rubber block is firm, etc.

Common faults in car engines are:

1. At various speeds, the muffler emits a rhythmic "sudden" sound and slightly emits black smoke;

2. The speed cannot be raised to high speed, and the power of the car is obviously insufficient;

3. The engine is not easy to start; It is not easy to speed up (stuffy) after starting, the car is weak to drive, and when accelerating sharply, the carburetor sometimes backfires, and even the engine is easy to stall, and the engine temperature is high;

4. The engine accelerates slowly under idle conditions, but when accelerating sharply, the engine speed cannot be increased, and sometimes the carburetor is tempered;

5. The engine temperature is normal, and it works well at low, medium and high speeds, and after relaxing the accelerator pedal, the speed is too high or the idle speed is unstable or even stalled;

6. The steering wheel trembles at high speed;

7. Deviation when driving.

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.

Hello, if the engine fault indicator lights up, it means that there is a fault in the engine control system, which needs to be read by a special computer to analyze which aspect is caused, it may be a line failure, a sensor failure or a control module failure, etc.