How to clean the DMRV: node device, work procedure, common mistakes

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

The article will tell you how to clean the DMRV. With your own hands, all the work can be done quite simply, you just need to follow the recommendations. A mass flow sensor is a device without which the normal functioning of an internal combustion engine is simply impossible. If the sensor malfunctions, it will affect the operation of the entire device. How to correctly find a sensor malfunction, as well as methods for cleaning it, will be described in our article.

What does a sensor malfunction affect

How to clean the DMRV will be described below. First you need to analyze the causes and signs of failure of this device. The data that is transmitted by the flow meter affects the proportion in which gasoline and air will be mixed. And this is extremely important for the normal functioning of the internal combustion engine in various operating modes. If the device fails, this will cause the engine to startimpossible or problematic.

Symptoms of breakdown

Now let's talk about how you can understand that the sensor has become unusable or needs cleaning. We will talk about how to clean the DMRV VAZ below. And first, consider all the symptoms of malfunctions:

1. The Check Engine light on the control panel lights up.
2. Gasoline consumption increases significantly.
3. Engine power is reduced, it takes the car much longer to pick up speed.
4. Decrease in momentum, especially when accelerating quickly.
5. Engine either won't start at all or is difficult to start.
6. Unstable idle.

Causes of failure

And now let's talk about what are the causes of breakdowns of this device. Before you clean the DMRV sensor, you need to make sure that it is really to blame for this behavior of the engine. Breakdowns can occur for the following reasons:

1. Clogging of the active part of the sensor. In principle, this is normal, normal flushing can solve all problems.
2. Complete failure of the device. In this case, only a complete replacement of the element will help.
3. Destruction of the wiring, as a result of which the sensor is not connected to the control unit and power supply.

It is worth paying attention to the fact that the symptoms of malfunctions listed above can also indicate breakdowns of other systems and mechanisms. Therefore, before carrying out repairs, it is necessary to correctly identify in which nodethere is a malfunction.

How to diagnose the sensor

There are several ways to diagnose the mass air flow sensor. But we will choose the fastest and easiest. In order to carry out diagnostics, it will be necessary to disconnect the power from the sensor. The engine must then be running. When the contact is disconnected from the sensor, the engine control unit will go into emergency mode.

Consequently, in this case, the fuel mixture will begin to form according to the parameters that will be received from the throttle assembly. It should be noted that in this case the turnover can increase up to one and a half thousand. It is worth noting that this does not happen on all cars. And now, with the sensor turned off, you need to drive a little. In the event that you notice that the engine performance has improved, you will undoubtedly need to change the sensor.

Liquid Moli Cleaner

And now we will look at what cleaners can be used when flushing the mass air flow sensor. There are a lot of cleaning products on the market today. The most effective can be called "Liquid Moli" from a manufacturer that produces transmission, motor oils, as well as other liquids. If you trust the official information provided by the manufacturer, the cleaner is of high quality.

Consequently, the price of such a solution will be quite high. If you believe the experts, then the liquid cleanerMoli copes with the task very well. The tool perfectly removes dirt and deposits from the sensor. If the sensor was in working condition before cleaning, then the use of the product can significantly increase the resource.

Alcohol

Another good cleaning option is alcohol. This is the oldest and most proven cleaning method, but it is also distinguished by its effectiveness. Due to its chemical properties, the liquid copes very well with blockages that accumulate on the sensitive elements of the sensor. This method is used quite rarely today, since it is much more difficult to get high-quality alcohol than a Liquid Moli-type spray.

Carburetor & WD-40 Cleaner

Quite often used liquid, which is used to clean carburetors. The cost of one can of such a liquid is somewhat lower than that of the Liquid Moli spray. With this composition, you can perform effective cleaning. Moreover, in practice it turns out that this tool is very effective in getting rid of all impurities.

Penetrating lubricant type WD-40 can also be used. The composition is used to clean various components from rust, dirt. WD-40 does a pretty good job of cleaning MAF sensors.

Cleaning instructions

You can clean the sensor in a garage, no difficulties will arise. Depending on which vehicle you have, the process for removing the sensor may vary.

We will reviewexample of removing an element from a VAZ car of the 10th family:

1. Immediately, turn off the ignition and remove the negative terminal from the battery.
2. Then find the location where the sensor is installed.
3. After that, disconnect the connector from it.
4. A pipe is made to the device, it is necessary to remove it.
5. Using a wrench, unscrew the screws securing the device to the air filter housing.
6. It is necessary to remove the sensor from the corrugation. On the ten, in order to dismantle, you will need a key in the form of an asterisk.
7. Unscrew the screws, and then remove the sensor from the seat.

If after removal you notice that there is oil on the element, you need to clean the case from it. To do this, you must use any tool described earlier. Cleaning must be non-contact.

Cleaning element

The sensitive element of the sensor is made in the form of a film. On it are several controllers that look like wire and are attached to the resin. Spray the sensor with a cleaner. Be careful as the film may be damaged. After treating the sensitive part, you need to wait a bit for the product to work.

In the event that there is a lot of pollution, it most likely makes sense to repeat the entire procedure one or two more times. For faster evaporation of the product, it is allowed to use a pump or compressor. But you can not set very high pressure, sohow that would only destroy the sensor.

Conclusion

The cost of "Liquid Moli" is about 800 rubles. As mentioned in our article, other methods can be used for cleaning. In addition to the need to clean the controller, it is desirable to also process the mesh in the nozzle, as well as the entire inner surface. Replace the hose if it is damaged or shows excessive wear.

Is it possible to clean the MAF with a brush? In no case, use only contactless cleaning. It should also be noted that at the same time, experts advise changing the air filter. Therefore, check the status of this element in advance. Before installing the air mass sensor, make sure that the seal fits as tightly as possible.

In the event that the element does not fit very tightly, you will encounter the problem of air leakage from the outside. Common mistakes such as brushing and installing a part with a loose fit will contribute to the rapid failure of the MAF. Now you know how to clean the MAF with your own hands correctly and what tools are needed for this.