Fengyun 2 exhaust pipe emits black smoke and high fuel consumption

The black smoke emitting from the car indicates two problems

1. There is a problem with the throttle spark plug and fire divider wire also need to be checked and replaced.

2.There is a problem with the carburetor, and the high fuel consumption is also proof that the carburetor has a problem.

In addition: incomplete combustion, lack of cylinder, too thick mixture, poor air intake, etc. may cause black smoke.

It is recommended to clean the oil circuit, carbon deposits, and throttle valves. Also look at the position of the throttle when it is installed.

The fuel burns impure powder, repair it.

The black smoke emitting from the car indicates two problems

1. There is a problem with the throttle spark plug and fire divider wire also need to be checked and replaced2There is a problem with the carburetor, and the large fuel consumption also proves that the carburetor has a problemIn addition: incomplete combustion, lack of cylinder, too thick mixture, poor air intake, etc., may cause black smoke, it is recommended to clean the oil circuit, carbon deposit, and throttle.

Also look at the position of the throttle when it is installed.

New cars、This phenomenon is very common on old cars, and here are the possible reasons:

1.The computer version is malfunctioning, resulting in an imbalance in the air-fuel ratio, but this does not usually happen.

2.Absolutely do not burn the engine oil, because if the oil is burned, the exhaust pipe should emit blue smoke. So negate the conclusion upstairs 3The oxygen sensor is faulty, which causes the signal received by the computer to be distorted, affecting the air-fuel ratio.

The combustible mixture is too thick, see if the air filter is too dirty. If not, it is recommended to go to a repair shop for repairs.

For a variety of reasons, the quality of the spark plug is not good, the carburetor atomization of gasoline is not good, the ignition circuit has occasional power failure problems, cylinder wear, piston and piston ring wear, will cause relatively large fuel consumption and black smoke. It is best to ask a professional to inspect and maintain it.

The quality of the oil is not good, it contains too much water, and the oil is not good, which may cause this situation.

1. Causes of black smoke.

1.The flammable mixture is too thick. 2.There is too much oil in the engine fuel. 3.Poor piston ring or crankshaft oil seal sealing. 4.There is moisture in the fuel. 5.Bad spark plug 6The air filter is too dirty.

2. Fault diagnosis and elimination.

1.For the inspection and diagnosis of excessive concentration of combustible mixtures, the carburetor and air filter should be checked.

2.The blend does not compare with the blend of the oil, or the wrong grade of oil is used. If the oil mixture contains too much oil or the oil quality is poor, the oil of the flammable mixture cannot be completely burned, resulting in black smoke.

The above phenomenon can also occur in two-stroke engines with separate lubrication and oil pump misalignment and excessive oil supply. At this time, the oil pump should be checked and adjusted according to the regulations to ensure that the lubricating oil is supplied proportionally at different throttle openings.

3.Excessive wear or breakage in a four-stroke engine, as well as too much oil in the crankcase, can cause oil to string into the combustion chamber and cause excessive oil in the mixture. If the crankshaft oil seal of a two-stroke engine is broken, it will also cause the oil from the transmission to string into the crankcase and enter the combustion chamber with the mixture.

4.One of the reasons for the mixing of water in the fuel is that the fuel in the fuel tank itself contains water, so the fuel tank should be cleaned and the fuel should be replaced. Another reason is that the cylinder gasket of the water-cooled engine is broken, and cold water enters the cylinder.

If, in the absence of leakage, the water in the tank is consumed too quickly, and the exhaust smoke from the exhaust pipe is slightly white, this is mostly the reason and the head gasket should be replaced.

Black smoke from gasoline engines is rare, black smoke is mainly not completely burned fuel in the combustion chamber, in the case of high temperature and lack of oxygen, diesel can not be completely and fully combusted, so decomposition and aggregation to form soot, it is a small diameter of the aggregate.

Because this aggregate reacts much slower than gasified fuel, due to the high temperature and anoxic environment of the combustion chamber, it cannot be fully burned again and is discharged through the exhaust pipe, so black smoke is presented.

The direct consequence of this phenomenon is that the fuel consumption of diesel engines is very high, the power is reduced, and at the same time, a large amount of carbon deposits exist in the piston and piston ring valves. In severe cases, the piston rings will be jammed, the valve seal is not tight, and the air leakage will be accelerated, and at the same time, it will also accelerate the wear of parts, thereby reducing the service life of the engine, so this aspect should be paid special attention.

When the engine is old, black smoke means that the engine burns incompletely, with more oil and less gas, and the mixture is too thick; Ignition work is not good, etc. There are many reasons for this, the fuel system, ignition system and engine idle speed are unstable, it is recommended to check the working condition of the spark plug. It may be caused by incomplete combustion caused by the cylinder pressure of the car being too low.

Incomplete combustion of gasoline produces black smoke that is then discharged from the exhaust pipe. There is a problem or malfunction in the ignition system of the car, such as spark plug leakage, high voltage too weak or weak flashover, etc. The quality of the gasoline used is faulty or too bad.

For example, the oil is mixed with crude oil varieties such as benzene for industrial use.

The reason is that due to the rupture of the intake pipe, the impurities in the air are not filtered and are directly sucked into the engine, resulting in an increase in carbon deposits in the engine cylinder, it is recommended that you go to the repair shop as soon as possible to overhaul the engine, otherwise the consequences are likely to be engine reimbursement.

If the intake pipe is broken, the impurities in the air will be sucked into the engine, which will speed up the wear and tear of the engine, there is no problem with gluing the hole, and it will not affect the performance of the engine.

You can't stick part of the air of the engine will be sucked directly into the engine without air filtration, which will cause these failures you said, the longer you use it, the greater the harm, and the broken intake pipe will cause the intake resistance of the engine to change, if the electronic control system of the EFI engine has an impact, it is recommended that you change a good intake pipe, if it is used for a long time, it is recommended that you clean the engine intake system.

What are the aspects affected by a broken intake pipe?

1. The air enters the engine without filtration, and impurities such as dust enter the engine cylinder, resulting in the wear of the abrasive of the engine and reducing the service life of the engine.

2. Replace the intake pipe if it is damaged, don't spend a lot of money to save a small amount of money.

3. If the intake pipe is damaged for a long time, resulting in excessive wear, it will lead to black smoke from the vehicle engine, a decrease in power, and an increase in fuel consumption

There is a hole that will not cause this problem in the first place, and it is recommended to return the tube.

How to solve the problem of black smoke from the car

1: Due to the uneven or excessive oil supply of each cylinder of the high-pressure oil pump. The uneven oil supply will produce unstable speed and intermittent black smoke, which should be adjusted to make it balanced or within the specified range.

2: The exhaust back pressure is too high or the exhaust pipe is blocked. This situation will cause insufficient air intake, which will affect the air-fuel mixing ratio, resulting in excessive oil volume.

Solution: First, there are too many bends in the exhaust pipe, which should be minimized; The second is that the inside of the muffler is blocked by too much soot and should be removed.

3: Insufficient air intake or blocked air intake pipe. In order to find out the cause, the following tests should be performed:

is whether the air filter is blocked;

It is whether the intake pipe is leaking (if this is the case, the engine will be accompanied by a harsh whistling sound due to the increased load);

Is the turbocharger damaged or not. Solution: Check whether the blades of the exhaust gas wheel and the booster wheel are damaged and whether the rotation is smooth and flexible; Fourth, whether the intercooler is blocked.

4: The problem of the oil itself. The oil grade used is wrong, the viscosity is too large, or the quality of the oil is too poor, it is not easy to ignite, so that the exhaust emits black smoke, and the combustion chamber and exhaust pipe are also easy to produce carbon deposits.

5: The intake and exhaust valve clearance is too large, which reduces the valve opening, or the parts of the fitting mechanism are loose, worn and deformed, the relative position of the camshaft gear and the crankshaft timing gear changes, and the valve opening and closing time is incorrect, resulting in insufficient fresh air in the cylinder. Workaround:

Valve clearance, valve springs and valve seals should be checked.

6: The plunger parts of the fuel injection pump are seriously worn, so that the oil supply pressure of the oil pump rises slowly, which affects the normal fuel supply time, and prolongs the injection process of the fuel, and affects the quality of the fuel injection atomization.

7: The wear of cylinder liner and piston assembly is serious. When this happens, the piston ring seal is not tight, and the air pressure in the cylinder drops seriously, resulting in the diesel fuel can not be fully burned and black smoke is emitted, and the engine power drops sharply.

Solution: Wear parts should be replaced.

It is recommended to check the cylinder line every 30,000 kilometers, check the spark plug every 10,000 kilometers, and replace the problem in time.

If the fuel consumption is high, there is no way to look at the model of your car, and the fuel consumption of each car brand is different.

There is a problem with black smoke, which means that you burn engine oil, it is best to go to the 4S shop and let them help you fix it.

Hello, fuel consumption mainly depends on your usual driving habits and road conditions, the general road conditions are more congested or usually drive more fiercely will lead to fuel consumption rise.

You haven't been able to handle this car well, who handled it? Yourself? If it is handled by an individual, the level is limited, and the handling is not good, which is normal, you can go to a professional car repair shop and overhaul it.

Hello, high fuel consumption and black smoke are suspected that the engine injection is too much to cause the internal oil and gas ratio is not right, and the combustion is not sufficient, it is recommended to go to the 4S shop for detailed inspection.

Black smoke from the Passat exhaust pipe and high fuel consumption indicate insufficient combustion and poor mixing ratio. The causes of this problem, in addition to the poor working of the oxygen sensor, are also important causes of intake system problems (such as throttle, air flow meter, intake manifold pressure sensor), spark plug ablation, and cylinder line leakage.

Oxygen sensor: Oxygen sensor is a standard configuration on the car, it is a measuring element that uses ceramic sensitive elements to measure the oxygen potential in the exhaust pipe of the car, calculates the corresponding oxygen concentration by the principle of chemical equilibrium, and monitors and controls the combustion air-fuel ratio to ensure product quality and exhaust emission standards. Oxygen sensor is widely used in the atmosphere control of various coal combustion, oil combustion, gas combustion and other furnaces, and is the best way to measure the combustion atmosphere, with the advantages of simple structure, rapid response, easy maintenance, convenient use and accurate measurement.

The use of this sensor for combustion atmosphere measurement and control can not only stabilize and improve product quality, but also shorten the production cycle and save energy.

Cylinder line leakage is also an important cause, spark plug ablation, intake manifold pressure sensor), high fuel consumption, air flow meter. The cause of this problem, the intake system problem (such as the throttle, in addition to the poor working of the oxygen sensor, the mixing ratio is not good, indicating insufficient combustion. Black smoke from the 8t exhaust pipe Passat B51

This is not entirely the case, the air flow meter is broken is also this phenomenon, and there is a problem with the throttle valve and fuel consumption, your maintenance idea is to find a detection computer to detect it, to see if there is a fault code, and then look at the data flow, the data of the oxygen sensor fluctuates left and right. General maintenance is to first see if there is a problem in the upstream of oxygen, and finally consider oxygen sensing, because the car is like a person, if you eat abnormally, it is not normal to pull, I explain to you like this, do you understand?