MD tuning of the LADA throttle body (how to do and reviews)

May 11, 2017 Lada.Online 134 323 10

MD tuning stands for throttle modernization. There are quite a few ways to modify the throttle assembly, but this article will discuss the most popular scheme proposed by the American engineer Ron Hutton. According to him, correct MD tuning can increase engine power and reduce fuel consumption by up to 25%.

DIY throttle tuning

The price of MD tuning at a service station is from 3,000 to 7,000 rubles. As the experience of VAZ and LADA owners shows, it is possible to correctly modify the throttle assembly (CS) yourself, without having any special knowledge or precisely verified drawings. The only special tools you need are a 6 mm spherical cutter and a drill.

Revision procedure

Remove the throttle assembly.
Make two recesses around the damper (approximately 2-3 mm, no more than 5 mm), as shown in the drawing (great accuracy does not matter).
Remove burrs with fine sandpaper.

The process is also shown in the video:

The process itself is not complicated and will not take much time. The advantage of MD tuning is that there is no need to flash the electronic engine control unit.

Self-cleansing procedure

If the damper is electronically actuated, then it is better to remove the negative terminal of the battery. Next, you can do everything according to simple instructions:

dismantle the air filter by unscrewing the pipe clamp;
disconnect all connectors of the throttle module and other pipes;
move the air filter receiver to the side so that it does not interfere, and begin cleaning the damper;
upon completion, reassemble the damper module in reverse order, checking that everything is in place;
After assembly, start the engine and check the idle speed.

In some cases, before you begin to adapt the throttle valve on a Toyota, Nissan or Skoda, it is necessary to remove the throttle itself, which allows you to completely clean the valve. To do this, you will need a 5 mm hexagon to unscrew the 4 fasteners. Removing the throttle should be done with great care, as there is a risk of damaging the gasket.

If, after cleaning the throttle body, increased idle speed is observed, it means that the damper needs to be adapted. What this is is further in the topic of the article.

Reviews about MD throttle tuning

Advantages of MD tuning:

The gas pedal becomes more informative (more responsive).
Increase in power in the range from 1000 to 3000 rpm.
Reduced fuel consumption.

Disadvantage of MD tuning:

Loss of elasticity.

Checking the effectiveness of MD tuning in practice (
cable
):

The gas tank was filled to maximum.
We drove about 20 km.
Once again we filled the tank to the maximum and got a consumption of 2.01 liters.
We did MD tuning on a throttle body with a diameter of 46 mm.
We drove along the same section of the road.
We filled the tank to the maximum (gasoline consumption was 1.61 liters).

Thus, fuel savings after modification of the throttle assembly amounted to about 20%. During the experiment, an increase in low-end power was noted. Watch the experience in the video above from 12 min 30 sec.

Testing the effectiveness of MD tuning in practice (
E-Gas
):

A similar experiment was carried out on a car with E-Gas. Fuel economy in this case was about 9% (was 1.5 liters, now 1.37). There is a faster response to the gas pedal. See also how to adjust E-Gas.

ps If after MD tuning there are problems with idle speed, then most likely the tightness of the closed throttle valve was broken (the chamfers were made too deep).

Have you modified your car this way? What feedback can you leave about MD tuning?

Let us remind you that we previously talked about other modifications that can improve engine performance. For example, installing a PCV valve in the crankcase ventilation system, as well as installing capacitors in the car’s ignition system.

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Electromagnetic throttle valve

The electronic analog, unlike a mechanical unit, allows you to achieve the optimal torque value in any engine operating mode. The level of fuel consumption is reduced, and driving such a car is comfortable and safe. The main distinctive features (and in this case, advantages) are the following:

idle speed is controlled by moving the throttle valve;
there is no mechanical connection between the pedal and the damper.

Due to the fact that there is no mechanical connection, torque can be controlled electronically instead of the gas pedal. The damper module itself consists of the following elements:

housings;
the damper itself;
electric drive;
return spring mechanism;
damper position sensors.

Installing not one, but two damper position sensors in the module will improve reliability. For this purpose, magnetoresistive devices or potentiometers with sliding contacts can be used. It is precisely because of the breakdown of these elements that it is necessary to decide how to adapt the throttle valve on many cars.

If a malfunction occurs in the electric drive, the damper is brought to the emergency position due to the return spring mechanism. In this case, the module itself must be replaced, which can only be done as an assembly.

Cleaning the throttle body of Lada Granta 8 valve

Tools:

Medium Phillips screwdriver
5 mm hex key

Parts and consumables:

Notes:

The main symptoms of a dirty throttle valve are:

Floating idle
Difficulty starting the engine
Car jerking when driving at minimum speeds

The damper is contaminated by carbon deposits and oil vapor from the crankcase ventilation system, so it is advisable to clean it every 40-50 thousand km.

1. Remove the throttle assembly. Contamination is visible on the throttle valve and on the assembly channel.

2. Treat the internal cavity of the throttle assembly, the throttle valve itself, its axis and the walls of the air channel with an aerosol cleaner.

Note:

It is advisable to avoid getting the product on the plastic part of the throttle assembly and the electrical connector.

3. Wipe off heavy dirt with a rag and re-treat with an aerosol.

4. Check the results of cleaning the throttle assembly.

5. The cleaned throttle assembly must be dried and installed back on the vehicle.

Perhaps this is exactly the case when one should not interfere with a properly working mechanism, because... There were no indications for surgical intervention in the Granta throttle assembly.

The engine is running. Idle speed does not float. The response of the throttle to the electronic accelerator takes place in normal mode. Occasionally, while standing at a traffic light, I noticed that the tachometer needle was trying to unobtrusively change its position, but the electronics quickly eliminated this incident. In early spring, one could refer to a certain amount of condensation that sometimes appears in the fuel system. Now, May. Warm. But sometimes the arrow still tries to “twitch”.

The situation is not annoying, but the mileage is under 17,000 km. indicates that behind the throttle it is not at all the same as it was in the first hundreds of kilometers.

I did not contact the “dealer” service station, where Grant was under warranty, to clean the throttle. After we “adjusted” the thermal clearances of the valves during maintenance-1, there was no desire to communicate with such “specialists”.

It’s high time for AVTOVAZ to check its dealers and subdealers for high-quality performance of work when undergoing scheduled maintenance of warranty vehicles. There are enough statistics. And those who are negligent will be punished with a ruble so that the desire to run an official car service will no longer exist once and for all.

If adjusting the “valves,” for me, still requires consolidating the experience gained, then with cleaning the throttle valve, everything is much simpler.

What you needed: * Hex key 5 mm. * Star key T-20. * Flute brush. * Lubricant. * Thread locker. * New bolts with washers, made of stainless steel. * Phillips and slotted screwdriver. * Cheap degreaser. * Spray for cleaning carburetors and chokes. *Cotton rags. lint-free. *Disposable rag on a roll. *Rechargeable cylinders and a hand pump for them. *Waste bag.

Using the “Open Diag” program, we take screenshots of the throttle position before starting cleaning.

Increased idle speed, dips and jerks when accelerating the car, loss of power - all this indicates problems with the throttle valve, which needs to be removed and cleaned, or replaced, if cleaning does not give the desired result, the unpleasant phenomena persist.

The procedure for removing the throttle assembly on a LADA Granta car

To remove the damper you need to perform the following operations:

The wire is disconnected from the negative terminal of the car battery.
The tightening that secures the ventilation hose going to the engine crankcase is loosened.
The hose attached to the fitting of the air supply pipe is disconnected.
The clamp connecting the pipe and the throttle becomes loose.
The pipe is disconnected.
The connector connecting the wires to the throttle assembly is disconnected.
The bolts securing the throttle valve are unscrewed.
The gasket located on the flange of the intake module is dismantled.

It should be noted that the gasket is disposable; when dismantling it, it is necessary to subsequently install a new element.

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Downloading a book

Replacing the handbrake of a lada granta (VAZ Granta)
After successful payment (by any method) and return to the KrutilVertel store from the payment system website, you will be taken to the successful payment page:

The book you purchased will be in your personal account, from where you can always download it.

Please note that after making the payment, you need to return back from the payment system website to the KrutilVertel website. If for some reason you did not return back to the site and closed the payment system tab with a message about the successful completion of the payment, please let us know - we will send you a letter indicating access to download the book

If for some reason you did not return back to the site and closed the payment system tab with a message about the successful completion of the payment, please let us know - we will send you a letter indicating access to download the book.

Oxygen concentration sensor (lambda probe) Lada Granta

This device is intended to assess the remaining unburnt fuel, and also estimates the amount of oxygen contained in the vehicle exhaust. The catalog number of the lambda probe on Grants is 21074-3850010-00.

The signal from the oxygen concentration sensor on the Lada Granta is used by the control system to ensure the optimal proportion between air and gasoline in the combustion chamber; based on the information received from the DC, the ECU makes corrections in the composition of the mixture of air and gasoline. The lambda probe is installed in the Granta intake system, or more precisely, in the catalytic converter.

https://youtube.com/watch?v=jDR9QzVC_g8

The main signs of failure of the described element include:

significantly increased fuel consumption;
floating speed of an idling engine;
problems when accelerating a car.

Examples of throttle valve adaptation on VAG and Lancer IX vehicles

In this video, they will tell you and show you how to adapt the damper for a VAG car.

Adaptation of remote sensing for Volkswagen Golf 4:

We warm up the engine to t=80 0 C and turn off the car. Then we connect the USB-KKL cable to the diagnostic connector and, after turning on the ignition, launch the diagnostic program (VAG-COM 3.11).
We enter section 01-engine.
We poll the fault memory (02).
We erase detected faults (05).
After returning to the previous menu, enter the “adaptation-10” section.
On channel 00, press the “read” button.
Save the result and return to factory settings.
Enter the basic settings (04) and go to the measurement mode.
If the group value is 001, press “start”.
We wait 2-3 minutes, then close the program and disconnect the cable. Adaptation is complete.

Adaptation of remote sensing of Nissan cars with an electronic gas pedal:

Fully release the accelerator pedal.
Turn on the ignition for at least 2 seconds.
Turn off the ignition and wait at least 10 seconds.
Turn on the ignition for at least 2 seconds.
Turn off the ignition. The accelerator pedal adaptation procedure is completed.
We are adapting the throttle valve. The accelerator pedal is released.
Turn on the ignition and turn it off immediately. We wait at least 10 seconds. During this period of time, the damper moves.
We teach air supply at idle speed (XX).
Warm up the engine and gearbox to operating temperature.
We turn off all electrical equipment of the car.
We start the engine and bring it to operating temperature.
Turn off the ignition and wait at least 10 seconds.
Fully release the accelerator pedal.
Turn on the ignition and wait at least 3 seconds.
Within 5 seconds, press the accelerator pedal five times, then wait 7 seconds.
Pressing the accelerator pedal, hold it until the CHECK stops flashing and lights up constantly (about 20 seconds are required).
After the CHECK light comes on continuously, you must release the pedal within 3 seconds.
We start the engine to run at XX.
Press the pedal several times to check the stability of the XX.

Adaptation of remote sensing on VW Passat B5:

We recommend that you watch this video, it will show you how to adapt the damper for a Passat car.

Warm up the engine to operating temperature and turn off the car.
We turn on the ignition, but do not start the engine.
We connect the cable to the diagnostic connector and launch the program.
We enter section 01-engine.
We enter the basic settings (04).
In the damper adaptation we select 060 for cars with electronic damper control, and value 098 for cars with cable-controlled damper.
Let's start the adaptation.
We are waiting for the “ADP RUN” entry to appear on the screen and the subsequent “ADP OK” entry.
We return to the basic settings.
Turn off the ignition. Adaptation is complete.