The old Audi A6 occasionally misses and emits black smoke

Hello, your fault should be caused by too much fuel injection and too concentrated mixture, the reasons are: the air intake sensor signal is abnormal, the correction of the water temperature sensor and the oxygen sensor is abnormal, the oil pressure of the gasoline pump is too high, and the fuel injector is leaking.

Check whether the air flow sensor, water temperature sensor, oxygen sensor signal is normal, and then check whether the pressure of the gasoline pump is in the standard range, whether the fuel injector is leaking, please repair it in time if there is a fault, I am very happy with your problem, I hope it can help you, I wish you a happy car!! Car questions, ask the car guru. 4S shop professional technician, 10 minutes to solve. 】

This may be a malfunction of the oxygen sensor.

Hello, this is a problem with the oxygen sensor, if it can help you, I hope to set it best, thank you.

The mixture is thin, the combustion is not sufficient, and the mixture contains water, which can be solved by using Mattie BE.

Black smoke from the exhaust pipe may be a problem in these places.

The first thing you need to do is that your car is too mixed with air, causing a problem with black smoke from startup! The main problem should be in the control, so we should go and check the flow sensor, check the throttle.

Position sensor, oxygen sensor.

If you find a problem, you should replace it immediately, this is replaced in the 4S store!

By the way, check the mechanical aspect to check whether the fuel pressure is correct, because the car is maintained by us, if you don't maintain it often, then I think the car will break faster!

The second question should arise here.

Your car may have more serious symptoms of carbon pollution, and it is best to clean the air intake, combustion chamber, and three-way catalytic converter regularly.

In these places, such as the throttle, finally use the exhaust gas analyzer to detect the combustion data to determine the effect of construction, so that it will be easy to help you solve the problem!

Third, black smoke from the exhaust pipe is usually a problem with spark plugs.

The working condition is not good, and the fuel in the cylinder is not burned sufficiently, resulting in black rock.

In the face of this situation, we should regularly maintain and replace spare parts, so as to ensure the availability of the car.

Fourth, it may be that you do not master the time in the process of ignition, if the time is not right, it may also cause your car to emit black smoke, of course, driving habits are very important, driving habits are not good, cylinder pressure is insufficient, and the engine temperature is too low may also lead to black smoke from the exhaust pipe, so we must regularly check the working status of auto parts!

The so-called black smoke is the incomplete combustion of gasoline, which is what we call burning gasoline, that is, there is more oil and less air in the mixture, which causes the mixture to be too thick, and the reasons for the mixture to be too thick are the following years.

1.There was a problem with the air flow sensor, which caused the actual air intake to be much smaller and the required air intake, the fuel injection was hail, and the mixture was too thick.

2.Air cleaner.

Heavily soiled, the actual air intake is much less than required.

3.There is a problem with the oxygen sensor, and the problem with the oxygen sensor is to monitor the air in the exhaust gas and know more, resulting in less air intake and more fuel injection in the next working cycle, resulting in the actual concentration of the mixture being too concentrated and the combustion of the mixture is incomplete.

4.Poor atomization of the injector or damage to the oil pressure sensor leads to excessive fuel injection, uneven mixing of the mixture, and incomplete combustion.

5.There is a problem with the ignition system, a spark plug or an ignition coil.

Poor or intermittent work leads to incomplete combustion of the mixture.

6.The engine computer malfunctioned, causing the control air intake system or fuel system to work out of order, resulting in an over-concentrated mixture.

7.Dirty throttle valve leads to abnormal throttle opening and insufficient air intake.

The black smoke of the car will also be accompanied by other faults, and the specific problems will be checked and analyzed on a case-by-case basis.

Audi A6 exhaust pipe emitting black smoke first to detect that the choke is not covered and is fully opened; After the flame is turned off, look at the main nozzle from the carburetor port to see if it is tightened or need to replace the main measuring hole of the macro brother; Detect air filters for clogging and clean or replace them immediately.

Check first that the choke is fully open; Look at the main nozzle from the carburetor port to see if the main measuring hole needs to be replaced. Check the air filter for blockages and clean or replace it in time.

If the engine shakes severely, the exhaust pipe not only emits black smoke but also makes an abnormal sound, and the acceleration is weak. Then we need to go to the repair fluid factory to check the spark plugs, oxygen sensors and air flow meter lamps in advance to troubleshoot.

1. Check the resistance value of the antifreeze air temperature sensor when the engine is not clear and the temperature of the antifreeze is the same, and compare it with the standard; Or use an ECU decoder to check and replace the antifreeze temperature sensor with a faulty problem.

2. The air flow meter or inlet pressure sensor should be checked, and its main parameters should meet the standard.

3. Measure the engine idle fuel pressure, the value should be 250kpa, and the fuel pressure is about 300kpa when the throttle is fully open.

4. Use the voltage answer meter or test lamp to connect the cold start injector wiring harness plug to detect whether the working duration of the cold start injector when the engine starts meets the standard value.

5. After unplugging the wiring harness plug of the oxygen sensor, if the engine emits black smoke and the sensor fails, it should be replaced.

6. Remove the injector and check whether there is oil leakage or stagnation in each injector. If there is any abnormality, the injector should be cleaned or replaced.

If the oil burning is serious, it can not be solved, and the 4S shop will add oil or replace the engine for free for new cars.

It is recommended to go to the 4S store to check and deal with it, which is more professional.

Black smoke comes out of the A6 Audi exhaust pipe, first check whether the choke is fully open; After the flame is turned off, see from the carburetor whether the main nozzle is tightened or whether the main metering hole needs to be replaced; Check the air filter for blockages and clean or replace it immediately.

Audi A6 exhaust pipe black smoke treatment;

1.Check the resistance value of the antifreeze temperature sensor at different engine antifreeze temperatures and compare it with the standard value; Or check with an ECU decoder and replace the faulty antifreeze temperature sensor.

2.Check the air flow meter or inlet pressure sensor, the main parameters of which should meet the standard.

3.The fuel pressure at engine idle should be measured at 250 kPa and about 300 kPa with the throttle fully open.

4.Connect the voltmeter or test light to the harness plug of the cold-start injector and check that the working reputation of the cold-start injector at engine start meets the standard value.

5.After unplugging the wiring harness of the oxygen sensor, if there is a problem with the engine smoke sensor, it should be replaced.

6.Remove the injectors and check each injector for oil leaks or jams. If there is any abnormality, clean or replace the injectors.

Millions of car purchase subsidies.

Summary. Hello, happy to answer your questions.

Hello, happy to answer your questions.

The white smoke from the exhaust pipe is very bad, and it is recommended to check whether the antifreeze is enough to see if the engine burns antifreeze.

There is no shortage of antifreeze, and there is white smoke from ignition to car heat.

What year the car, how much displacement, whether the cold car is good or not.

10 years, good fire.

Then if you have white smoke from this cold car, you will test two questions, when you are cold driving, see if there is water in the cylinder, and whether the fuel injector is leaking.

The car is also hot when it is hot.

Then you can only consider the cylinder head gasket and burn antifreeze.

There's no shortage of antifreeze.

Are you a car owner or a repair shop?

Owners. Then you find a repair shop to check, a lot of data needs professionals, I judge that the engine burns antifreeze.

If you burn antifreeze, can you clearly see that there is less antifreeze?

It's not too obvious, but it changes a bit.

If I can help you, please give me a thumbs up Thank you!

Summary. Hello dear, if your old Audi A6L exhaust pipe is smoking, there may be the following situations:1

Blue smoke: Blue smoke is caused by the oil entering the combustion chamber when the engine is burning, causing blue smoke to emit from the exhaust pipe. It could be that the oil got into the gap between the piston rings and the cylinder, which could be caused by damaged, misused, or poorly maintained engine parts.

2.White smoke: White smoke is due to water vapor entering the exhaust system, causing white smoke to emit from the exhaust pipe.

This could be due to the engine not heating up sufficiently, a faulty water cooling system or lack of coolant, or after the car has been parked in a humid environment for a long time. 3.Black Smoke:

The black smoke is due to the fact that the oil-gas mixture in the combustion chamber is not fully combusted, emitting a large number of carbon black particles. This can be caused by a clogged air filter, clogged injectors, a faulty oxygen sensor, a leak in the air intake system, or carbon build-up in the engine's combustion chamber.

Hello dear, if you block the smoke from the exhaust pipe of the old Audi A6L, there may be the following situations:1Blue Smoke:

Blue smoke is caused by the fact that when the engine burns, the oil enters the combustion chamber, causing blue smoke to emit from the exhaust pipe. It could be that the oil got into the gap between the piston rings and the cylinder, which could be caused by damaged, misused, or poorly maintained engine parts. 2.

White smoke: White smoke is caused by water vapor entering the exhaust system, causing white smoke to emit from the exhaust pipe. This could be due to the engine not heating up sufficiently, a faulty water cooling system or lack of coolant, or after the car has been parked in a humid environment for a long time.

3.Black smoke: Black smoke is due to the fact that the oil-gas mixture in the combustion chamber is not fully combusted, emitting a large number of carbon black particles.

This can be caused by a clogged air filter, clogged injectors, a faulty oxygen sensor, a leak in the air intake system, or carbon build-up in the engine's combustion chamber.

If there is smoke coming out of the exhaust pipe of your vehicle, it is recommended that you contact a professional model Qiyou car repair shop in time for inspection and repair to ensure the safety performance and normal operation of your vehicle.

Summary. Hello dear<>

The answer you're looking for: Is it normal for the Audi A6+ to rattle and shake and emit black smoke as follows: It's not normal, it's an engine failure or an emissions system problem.

When the vehicle clicks, shakes, and emits black smoke after starting, it is usually a vehicle malfunction. In the case of the Audi A6+ model, this can be caused by engine problems or emissions system problems. If such a fault is not dealt with in time, it may lead to more serious damage to the vehicle, and also affect driving safety and environmental protection.

Is it normal for the Audi A6+ to start clicking and shaking and emitting black smoke.

Hello dear<>

The answer you're looking for: The Audi A6+ clicks and shakes and emits black smoke is normal for the manna to be cautious as follows: Kissing is not normal, it is an engine failure or an exhaust system problem.

When the vehicle clicks, shakes, and emits black smoke after starting, it is usually a vehicle malfunction. In the case of the Audi A6+ model, this may be caused by engine problems or problems with the exhaust system. If such a fault is not dealt with in time, it may lead to more serious damage to the vehicle, and also affect driving safety and environmental protection.

Do you want to change the engine.

Hello dear<>

Find the answer for you: whether you need to replace the engine needs to be judged according to the specific fault situation of the shelter belt. If the problem stems from a failure of the engine itself, such as severe damage or wear to parts such as the engine block, pistons, gas doors, crankshafts, etc., then the engine may need to be replaced.

But if the problem stems from other parts, such as injectors, spark plugs, oxygen sensors, etc., then only those parts need to be replaced. However, replacing the engine is a complex project that requires a lot of time and labor costs, as well as professional technology and equipment.