Do-it-yourself Audi 80 carburetor repair

In detail: do-it-yourself repair of the Audi 80 carburetor from a real master for the site my.housecope.com.

Recommendations for the repair and maintenance of Audi 80 / Depending on the engine, the car is equipped with a carburetor or electronic fuel injection system and therefore a corresponding ignition system.

Carburetor Audi 80 B3. Topic in "Car Repair" by sportcar, Aug 11 The Audi 80 carburetor has a pair of falling air mixing chambers at its disposal.

Audi 80 cars are simple and reliable, but the carburetor eventually fails and cannot be repaired. Keihin 2 - for Audi engines only B3 platforms. Typical malfunctions of Audi carburetors.

To eliminate all the shortcomings, a more fine tuning of the carburetor is required, it can be done by a specialist. Pierburg 2EE Ecotronic is a carburetor with an electronic control unit, installed on Audi 80 platforms B2 and B3 with volume 1. Vasya, tell me please - the mixture quality adjustment screw should be installed o-ring rubber or not? Press firmly on the slow bar .. In any case, the excess oil must be drained or pumped out with a syringe ..

SanyaG last online 6 hours ago. Alexander Golub, 31 years old. Now the accelerator has flowed again and had to be disassembled. An autopsy showed that cracks had formed under the lid, and plus the second chamber was coked up and did not open .. I cleaned everything with a carburetor cleaner, then lubricated all the mechanisms with a WD-shroud, put washers and fitted the lid under the case .. Putting everything in place, I started it normally, but how I drove, then the revolutions hung by 2 thousand. After that I took apart and put everything back two more times, but the result remained the same ..

Video (click to play).

Today I had to go to that carburetor and he sentenced the accelerator pump lid! Hike my alignments killed her. The balls dangle inside and I did not bent it very much beforehand with a hairdryer - but that's it, the ball does not hold the fuel .. I was very lucky that he had such a cap, someone donated his old carb.

We went over everything again, installed it and the car flew .. Having talked well with him, I want to note from his words - Keikhin 1 cool carburetor, tenacious and economical! But his main problem is an accelerator pump made of dibbles.

Everything would be fine if the body of the carburetor and the lid were thicker, and they turned out to be very delicate, and they stand above the collector where there are large temperature drops. For myself, I drew conclusions from the conversation - the sealant and the carburetor are not compatible things - it should not be there anywhere!

If you cut the gasket out of cardboard - it’s paranoid for a maximum of a month, don’t repeat after me. If you make a gasket under the accelerator cover, initially it should not be there, then the hole should be larger than the membrane. The lid should press the membrane and the gasket around is purely for safety reasons .. I hope it will be useful information and do not repeat my mistakes - extra funds and a lot of time were wasted ..

As for the wedged second camera, I will add - periodically you need to use it so that this does not happen. And in my case, it flies a little from the breather - for this I have already bought a tank from the Volgovskiy hydraulic booster.

Updated: 2016-10-26

Audi 80 cars fell in love with their simplicity, reliability, excellent corrosion resistance. Many car enthusiasts still enjoy using Audi on B3 and even B2 platforms. However, the headache for the owner of the 80s Audi models is the carburetor, which eventually becomes unusable. First, car enthusiasts try to repair the original, but then they think about which carburetor can be used as a replacement.Our article will help you with minor repairs or finding a suitable replacement.

From the moment the Audi 80 was launched on the B1 platform and until the B4 platform was launched, the cars were equipped with carburetor engines. Initially, German Pierburg carburetors were installed, then with the start of the B3 platform, Japanese Keihin were added.

In 1991, a platform with the B4 index appeared, in which gasoline versions were equipped only with injection engines. From the moment the B1 platform was launched until the B4 platform appeared, the following were installed:

Solex 35 PDSIT - only for early models of the Audi 80 platform B1;
Pierburg 1B1, Pierburg 1B3 - simple single-chamber carburetors, installed on Audi B2 engines;
Pierburg 2B2, Pierburg 2B5 - two-chamber carburetors, installed on Audi B2 engines;
Pierburg 2E2 - for Audi engines of B1 and B2 platforms;
Pierburg 2EE Ecotronic - carburetor with an electronic control unit, installed on the Audi 80 platform B2 and B3 1.6 liter engines;
Keihin 1 - for engines Audi B2 and B3 platforms;
Keihin 2 - for Audi engines only B3 platforms.

Keihin and Pierburg carburetors are made up of many parts. During operation, moving parts will wear out, internal fuel and air passages become contaminated, which leads to a significant deterioration in engine performance. The main faults are air leaks, the development of moving parts, cracks in the diaphragms.

Often the reason for the deterioration of the Audi 80 engine is a crack in the elastic cushion installed between the carburetor and the intake manifold. Additional air enters through the crack, which significantly depletes the air-fuel mixture. For diagnostics, it is enough to shake the carburetor with your hand while the engine is running. If the motor stalls, then the elastic cushion must be replaced. The pillow cannot be repaired. Both the Keikhin and the Pirburgs are susceptible to the problem.

Over time, rubber hoses and gaskets lose their elasticity and break. Additional air is sucked in through the cracks in the hoses, the mixture becomes leaner. Defective hoses should be carefully inspected and replaced if necessary. To search for leaks, you can use a quick-start aerosol can, carefully treating suspicious places with it. The change in speed will tell you where the suction is.

Parts most susceptible to wear are the needle valve, needle valve seat, accelerator pump parts, throttle valve actuator assembly. With the wear of the needle valve, the level of gasoline in the float chamber rises, the mixture is enriched, this leads to increased consumption and deterioration of the engine. The needle valve cannot be repaired; it must be replaced. Carburettors with a depletion between the throttle shaft and the throttle body are also not repairable.

Many motorists do not understand why to put Solex on Audi, and are trying with all their might to restore the worn-out Keihins. But when trying to restore Keikhin, a motorist is faced with the fact that spare parts for them have not been supplied for a long time, or the price of spare parts is prohibitively high. Therefore, in this case, it would be reasonable to replace Keikhin with domestic Solex from VAZ and Niva cars. The Ozone carburetor, which was installed on the VAZ 2106 and Niva 2121 cars, turned out to be less reliable in operation due to design flaws, therefore it is not recommended to install it.

There are several varieties of Solex: DAAZ-2108, DAAZ-21083, DAAZ-21073. The DAAZ-2108 carburetor is installed on front-wheel drive cars VAZ 2108 and VAZ 2109 with an engine volume of 1.3 liters. The DAAZ-21083 model is installed on VAZ 21083 and 21093 cars with an engine volume of 1.5 liters. Niva cars are equipped with the oldest model DAAZ-21073, it is designed for a volume of 1.7 liters.

To figure out which Solex is suitable for your engine, you need to know its volume. The volume of the engine can be found both from the vehicle title and by the first two letters of the engine number.For an Audi 80 with a volume of 1.3 liters, Solex with an index of 2108 is suitable, a carburetor 21083 is suitable for a 1.6-liter engine, and Solex 21073 from Niva is installed in 1.8-liter engines of the Audi 80. On a 1.6 liter engine, it is allowed to install a carburetor 21073 from Niva.

- Carburetor 2108, 21083 or 21073, depending on the engine size;

- adapter for installing Solex on the intake manifold;

- new air filter housing.

It is also often required to rework the air damper drive cable and install an additional wire to supply power to the idle economizer valve. It is convenient to take power to the valve from the positive wire of the ignition coil. When powered from the coil, the valve will not function as an economizer, but will cut off the fuel supply when the engine is turned off, which prevents a possible glow ignition.

Usually, after the correct installation of Solex, the car engine starts immediately. Further, idle speed, operation in transient modes and dosing of gasoline with a sharp opening of both throttle valves are adjusted. Then a test drive is made, after which problems are often identified: dips during acceleration, detonation, pops from the intake manifold and exhaust system, increased gas mileage. To eliminate all the shortcomings, a finer carburetor adjustment is required, which a specialist can perform.

It is rather difficult to perform the adjustment on your own; additional equipment is often needed, such as a stroboscope, a gas analyzer. Usually, when adjusting, it is necessary to replace the main air and fuel jets, the idle channel jet, sometimes it is necessary to replace the accelerator pump cam. To fine-tune the carburetor, sometimes it is necessary to disassemble the carburetor several times to replace the jets, but after the final adjustment, Solex pleases the motorist with its stable and long work.

Audi 80 is one of the most popular cars, better known as "barrel". But in recent years, it has become difficult to get spare parts for this model: in particular, the original Audi 80 carburetor costs a lot and is rarely found on the market. However, the Keihin carburetor fitted to the Audi from the factory provides the best possible engine performance.The carburetor is a complex unit that needs timely adjustment. The Audi 80 carburetor has many functions that were considered innovations for their time. Often, replacing the original carburetor with a similar model of a domestic manufacturer does not give the desired results.But even the original carburetor can show its character from time to time. Symptoms vary. For instance:

Increased fuel consumption;

Reducing engine throttle response;

Decrease in power;

Unstable engine performance.

But if the carburetor is properly serviced from time to time, then such “surprises” can be avoided.Although the best carburetor is the original one, it is not always possible to find one. Thoughts immediately come to mind, which domestic carburetor can replace the native one? You can replace it, but you should also prepare for changes in work after it: the original carburetor is designed for the operation of the Audi 80 engine in any mode, all characteristics are selected with German precision. Of course, replacing the carburetor will change the characteristics of the engine.But, for lack of something better, you have to put what is. The carburetor installed on the eighth VAZ family has more or less decently proved itself. The advantages of such a replacement are sea: it is affordability, a minimum of alterations and the availability of components in any car stores.But there are also negative features of installing such a carburetor on the Audi 80: in half of the cases, the carburetor does not work as we would like. It either starts to consume an incredible amount of fuel, or the engine power is greatly reduced.It is not necessary once at a time, so analogs in this case are not a guarantee of a comfortable ride on an Audi.The original Keihin carburetor has a forced idle system. The principle of operation is visible from its settings:

The procedure can only be carried out on Audi 80 cars with mechanics: put the gearbox in neutral and start the engine.

We are gaining momentum with the gas pedal (no more than four thousand). With a working idle system of the carburetor, the revolutions themselves should equalize, dropping to about 1800 rpm.

After working a little in this mode, the speed is automatically reset to 800-900 rpm.

If the speed does not drop, it is necessary to adjust the carburetor throttle valve - remove the air filter, check the throttle thrust and the power of the solenoid valve:

The vacuum tube must be disconnected from the damper;

Put a hose on the branch pipe;

Suck air with your mouth:

The thrust is moving - the carburetor forced idle system is working.

The thrust is motionless - faulty. It cannot be repaired; replacement is required.

Disconnect the plug from the carburetor solenoid valve.

We connect a voltmeter to the plug and start the engine:

Voltmeter readings are 12-14 Volts - the circuit is working properly.

Other voltmeter readings indicate a malfunction of the ignition system switch, or a break in the connecting wires.

If the carburetor solenoid valve is working properly, then with the ignition off, it should completely shut off the fuel supply system. You can check it by trying to blow into it.

These are just the main malfunctions that can occur in the original Audi 80 carburetor. It is possible that after checking the carburetor it turns out that it is in order, and all the problems were in the ignition system. The symptoms are often very similar.In this video, I showed some of the reasons for the breakdown of the KEYKHIN carburetor, and how to eliminate them from my own experience.Vasek is great. Tell me about the crabs. I also have a suction, which means Keihin. The machine does not want to work at idle. It doesn’t build according to the deck. It’s all good. The candles are black. From what to jump.Vasya tell the checkpoint how much oil goes and what kind.Vasya added a look to his channel. It seems to have figured it out. Blowed quality screw channel. I got home without any problems. The turnover kept exactly did not fall. As for the valve, tell me where the hose goes from it.thank you for not a great reviewVasily, help to solve the problem. Keyhen 2 Audi 100 carburetor '88 It starts badly on a cold one, it will stand for a couple of days and it is very difficult to start, from 3-4 times, it happens from 5-6. the longer it takes, the harder it is to start. the suction naturally pulls out when looking for some. when to start - everything works fine, during the day it is good to start up when I’m already riding.Tell me what to do at the car Audi 80 V 3 1987 1.8, vibration starts under load and then stalls, what is the problem and what needs to be done.Carburetor: which one can be installed on the Audi 80? Pierburg 2EE Ecotronic is a carburetor with an electronic control unit, installed on the Audi 80 platform B2 and B3 1.6 liter engines.Owner's story of Audi 80 (B3) - tuning. For a long time, a great desire crept in to change my native keihin I. It was impossible to ride on Now you can start putting on the carburetor. But this requires cone-head bolts for the sweep.I want to change my native carburetor for an audi 80 RU 1.8 engine for a decent one. There is an option to stick a carburetor from the Niva 1.7. Should I change the jets in the Nivovsky carburetor?This method is used to optimize the combustion conditions of the air-fuel mixture. View Public Profile Find More Posts by dude. We do not have any zeroes on sale anywhere, but I don’t want to install it, nor filters from injector basins. I heard that if constant problems with the carburetor began, then it is almost impossible to achieve normal operation.First, car enthusiasts try to repair the original, but then they think about which carburetor can be used as a replacement.Our article will help you with minor repairs or finding a suitable replacement. During operation, moving parts will wear out, internal fuel and air passages become contaminated, which leads to a significant deterioration in engine performance. The main faults are air leaks, the development of moving parts, cracks in the diaphragms. Additional air enters through the crack, which significantly depletes the air-fuel mixture. For diagnostics, it is enough to shake the carburetor with your hand while the engine is running.If the motor stalls, then the elastic cushion must be replaced. Both the Keikhin and the Pirburgs are susceptible to the problem. Over time, rubber hoses and gaskets lose their elasticity and break. Additional air is sucked in through the cracks in the hoses, the mixture becomes leaner.Defective hoses should be carefully inspected and replaced if necessary. To search for leaks, you can use a quick-start aerosol can, carefully treating suspicious places with it. The change in speed will tell you where the suction is. Parts most susceptible to wear are the needle valve, needle valve seat, accelerator pump parts, throttle valve actuator assembly.With the wear of the needle valve, the level of gasoline in the float chamber rises, the mixture is enriched, this leads to increased consumption and deterioration of the engine. The needle valve cannot be repaired; it must be replaced. Carburettors with a depletion between the throttle shaft and the throttle body are also not repairable. Many motorists do not understand why to put Solex on Audi, and are trying with all their might to restore the worn-out Keihins.But when trying to restore Keikhin, a motorist is faced with the fact that spare parts for them have not been supplied for a long time, or the price of spare parts is prohibitively high. Therefore, in this case, it would be reasonable to replace Keikhin with domestic Solex from VAZ and Niva cars.To figure out which Solex is suitable for your engine, you need to know its volume. The volume of the engine can be found both from the vehicle title and by the first two letters of the engine number.It is also often required to rework the air damper drive cable and install an additional wire to supply power to the idle economizer valve. It is convenient to take power to the valve from the positive wire of the ignition coil. When powered from the coil, the valve will not function as an economizer, but will cut off the fuel supply when the engine is turned off, which prevents a possible glow ignition. Usually, after the correct installation of Solex, the car engine starts immediately.Further, idle speed, operation in transient modes and dosing of gasoline with a sharp opening of both throttle valves are adjusted. Then a test drive is made, after which problems are often identified: dips during acceleration, detonation, pops from the intake manifold and exhaust system, increased gas mileage.

Repair Audi 80 carburetor Keihin

Carburetor Audi 80 Keihin 2 two-chamber, with manual cold start (mechanical suction). Unlike Keihin 1, the body is cast from an aluminum-magnesium alloy. Not subject to deformation. The carburetor consists of three parts - a cover, a body, a throttle block. Installed on RU, SF engines. The main Keikhin malfunctions, the consequence of which is: difficult cold start, the engine troit during warm-up (stalls on suction), uneven idle (stalls at idle), increased gasoline consumption (candles are covered with soot), sluggish acceleration.First of all, it would be nice to check the condition of the engine (CH level and the presence of compression as such), as well as the ignition system (vacuum and centrifugal regulator, wear of the ignition distributor itself for excessive radial shaft play), the functioning of the electric heater of the intake manifold and the heating element of the idle channel course. After the engine is diagnosed, the carburetor is serviced.

Repair of the Keihin 2 carburetor is carried out according to the following scheme: Checking the completeness (especially for the presence of a quality adjustment screw), vacuum diagnostics of the air damper regulator and the secondary chamber drive; Replacing the heat block between the body and the throttle valve block (air leaks through dry rubber seals); Replacement of spray nozzle seals; Power valve replacement; Installing the original needle valve assembly; Fuel level adjustment; Replacement of the diaphragm of the accelerating pump; Checking two solenoid valves; Checking the pneumatic drive of the secondary chamber, replace if necessary; Air damper regulator - check, adjust or replace; It is better to use the repair kit for the original Honda car (incomplete): 16010-РТ1-000 Made in Japan; Further assembly, installation, adjustment.

The carburetor Audi 80 Pierburg 2EE is so-called electronic, since it is controlled by an ECU. Most often, the positioner fails, or rather the diaphragm. Less commonly, the angular position sensor, pre-throttle servo motor and coolant temperature sensors. Symptoms of failures Pierburg 2EE: increased idle speed (2000-3000 rpm on a warm engine); sharp jerks or twitching during acceleration; sluggish acceleration; a cold engine does not start, or it starts and stalls (it does not start the first time); Most often, of course, too high idle speed and diesel engine when the hot engine is turned off. Repair Pierburg 2EE: diagnostics; replacement of the positioner (repair of the positioner with replacement of the diaphragm); replacement of coolant sensors if necessary; check (replacement) of the TPS position sensor; check (replacement) of the mixture regulator; replacement (installation) of a new repair kit; installation, testing of cold start, rpm, CO, acceleration dynamics of the car.

Mikhail Ignatov: Vasily, good day to you !, tell me at the end of the video you said that there are two exits at the plant, and you go directly to a small vacuum cleaner, that is, did you mean the “ball” of the vacuum accumulator ?? And tell me where directly. And if I still have two outputs there with a valve, then connect the output to the "ball"? And the entrance with what?, Thanks in advance

Bekusya Skakov: Hello! when replacing an injector with a carburetor, also change the cable?

Arman Turanov: hello i have such a problem, audi 80 b 3 1.8litre carb ozone is installed. it starts up perfectly idle keeps it normal, but after three thousand the car stalls troit, the ignition is turned off again starts well. up to two thousand everything is fine.

Zharkynbek Raul: Hello, please tell me how to regulate the fuel consumption in the carburetor Audi 80 consumption very much I look forward to hearing from you thanks in advance

Djon Shtrauh: Hi Vasily, help an Audi 80 90g redesigned for a carbirato carbirato the same as in your video, for some reason it is bad gasoline gives almost no reason and how to find a gasoline pump?

Talgat Zhaksylyk: salam, I have a carb from an Audi 80 keihan, I want to install it instead of an injection fur, I want to know where to connect the wires from a keihan to an audi 100 c4 2.0
aad

Xamza Temirxanov: salam I have an audi 80 carburetor octal gasoline it goes a lot from the carburetor, after the repair, I cleaned the carburetor, but the consumption is higher

Vadim Vadimkin: Hello, tell me please, I can't get it right! 🙁
I have 80 audyushka, bought with Solex already standing. (the carber is new in appearance) removed and cleaned all the cases ..But the problem does not go away 🙁 In general, when driving around the city, the car works “normally”, but as you go out on the highway with a long drive when switching to neutral, the car stalls. it happens that the thrust starts to twitch and the thrust disappears, you press the pedal to the floor, the revolutions do not rise above 4k .. consumption increases! 🙁 Mostly in damp weather this happens (well, or at least it seems to me :)) And for some reason, my return pipe on the carburettor is drowned out, but I don't see yours. Thanks for the help.

Bis Er: If you change the Solex carburetor, do you need to install a low pressure gas pump or leave your own on the Audi 80, it will not pour fuel from the Solex carburetor with respect boris video class bravo profisianals like thanks

Erdos Imanbekov: Hello! Please tell me how to properly set up the carburetor. I have a lot of fuel consumption.

Misha Kozyulichev: Guys help the engine 1.6 carburetor rpm 400 you disconnect the wire from the carburetor all the numbers you give the gas immediately stalls you connect it again the rpm is 400 again and it works hit and miss and the audi 80 keihin gasps normally

Ant 13-UBD: hello Vasya tell me where you can buy a manifold for five cylinders? worth KE-Jetronic want to remake a carburetor! thanks in advance!

Seryoga Polkhutenko: Hello, what is the correct name of the valve xx, about which you talked about at 6.05 minutes, I can not find the full name anywhere, or as the people call it)))) and where to see which keyhin 1 or 2, all the carb was covered)) Thank you)

Dimon Dimon: Hello! But I have a nipple that should be plugged, for some reason the hose is removed to the air filter! And he draws the air great! I am suffering with great expense from the very purchase! Now he drowned it out.

Arhat Aldabergen: Hey! I had a Keigin Solex put it on eating a lot of gasoline (10 liters is enough for 35 km I don't know what to do?
and the lambda probe is not a magician naidi tell me please audi 80 ob1,8 motor sf 88 g

glory samaski: read my question

Wlad Dowbenko: Why does gasoline accumulate above the screw in the keikhin, where the adjusting screw (yellow) of the float chamber is, you look at the screw, and there is gasoline. What's the matter?

Andry Miss: I have a Hall sensor, instead of a vacuum cleaner

Andry Miss: and if a vacuum ignition timing controller is not installed at all on the distributor, then without it you should not hope for the stable operation of the car?

audi carburettors
let's tryndet about the carby
what are both circuit solutions principles and all that.

Post has been edited BMI: May 10, 2014 - 00:54

Popular message!

Keihin 1 and Keihin 2 carburetors (Keihen, Keihin). Cleaning, adjustment and advice.
________________________________________
From experience I know that there are few masters who know these carburetors well. You can learn it yourself, there is nothing difficult. I think it will be useful for martyrs and just fans to dig deeper.

DESCRIPTION.
The carb has two downstream mixing chambers that open in series. The air damper common to both chambers is manually operated. The throttle valve of the primary chamber is mechanically driven, and the damper of the secondary chamber is opened due to the vacuum generated in the diffuser of the primary chamber. The carba has a vacuum drive for opening the air damper (it is located on the carba cover near the dampers from above), which works when accelerating and fully opening the throttle valve when the engine has not reached operating temperature. The Karba Keikhin 1 vacuum system has a spherical vacuum receiver. Both types of carburetors are equipped with solenoid valves for cutting off the fuel in the idle system, in addition, Keihin 2 is equipped with a solenoid valve for cutting off the fuel in the main jet.

Adjusting the fuel level in the float chamber.
Take the removed carburetor cover so that the needle is at the bottom of the float, pointing up. Hold the lid at a 60-degree angle. so that the needle valve is closed but the spring loaded pin is free.Then on K1 measure the distance from the cover (without gasket) to the bottom wall of the float (gap 9 + - 1 mm), and on K2 from the cover to the top wall of the float (36 + -1 mm). The adjusting screw is located on the cover under the plastic plug. Before installing the cover, lubricate the mounting screws with thread seal and all connections with molybdenum disulfide grease.

MAXIMUM SPEEDS WITHOUT LOAD.
1. Warm up the engine to normal operating temperature.
2. Remove the air cleaner and plug the vacuum hose to control the inlet temperature flap.
3. Pull the choke control handle fully out until the choke is fully closed.
4. Use a screwdriver to open the choke, but keep the choke lever in the closed position.
5. Start the engine and check if the engine speed is within the limits specified in the technical data. If necessary, adjust the speed by bending the link arm.

AIR FLAP CONTROL UNIT (Keihin 1)
6. Pull out the choke knob fully.
7. Apply 400 mbar vacuum to the damper control unit, then check the gap between the damper and the inner wall of the carb and make sure that the gap is within the limits specified in the technical specifications. data. Bend the control arm if necessary.

BUVZ Keikhin 2
8. Pull out the control handle. air honored
9. Press in the control rod. air honored into the vacuum unit, then check the gap between the flap and the inner wall of the carb.

The control unit can also be checked in this way:
Press the stem into the block and plug the hole to which the vacuum hose is connected with your finger. If at the same time the stem extends outward, then the diaphragm of the block is faulty.

Accelerating pump performance.
1. With the carburetor removed, fill the float chamber with fuel to the correct level. Place the carb over the graded container.
2. Open the choke fully. Close the 1st chamber throttle completely by unscrewing the idle speed adjustment screw.
3. On carb K2, make sure that the accelerator pump lever is touching the plunger - no clearance is allowed.
4. Move the throttle lever fully to the open position ten times slowly (over three seconds or more).
5. Divide the amount of spilled fuel by 10 and compare with the rate indicated in those. data. Bend the stopper if necessary.

THROTTLE CHAMBERS HEATER (K2)
1. Unscrew the screws and remove the heater. Switch on the ignition.
2. Connect the light bulb between the yellow-black wire and the carb body. The light should be on.
3. Hang up the heating element. Connect the lamp between the heater body and the carb body. The lamp should be on.

Throttle retarder.
1. Warm up the engine and turn it off.
2. Start the engine and accelerate to 4000 rpm, then release the accelerator pedal. The engine speed should slowly drop to about 1800 rpm, stay at that speed, and then quickly drop to idle. If the engine reacts differently, check:
a) throttle valve positioner (on K1 it is located under the air damper control unit);
b) voltage at the control valve;
c) control valve.

Flap positioner.
Warm up the engine and apply a vacuum of 350 mbar (K1) or 400 mbar (K2) to the positioner. The engine frequency should be between 1200 and 1250 rpm. If the frequency differs from the indicated one, adjust it with the dedicated screw. Check vacuum tubes for leaks.

The voltage at the control valve (on K1 is at the back).
1. Warm up the engine and turn it off.
2. Disconnect the electrical connector from the valve and connect a light bulb or a voltmeter to the connector contacts.
3. Start the engine and let it idle. The voltmeter should show the battery voltage, and the light should be on.If not, check if there is voltage on the black wire of the connector. Connect a voltmeter between the brown / red wire and the positive terminal on the battery. Lack of voltage indicates an open circuit.
4. Reconnect the voltmeter to the connector pins. Slowly increase and decrease engine speed and note the moment when the control unit is turned on. At a speed of more than 1900 rpm, the voltmeter should show zero, and at 1759 rpm and below, the battery voltage. Replace the control unit if necessary.

Control valve.
1. Remove the air cleaner, start the engine and let it idle.
2. Disconnect the wires and vacuum tube from the valve.
3. At K1, disconnect the vacuum hose from the brake booster. 4. Remove the atmosphere connection cover from the control valve and connect the extension hose to the control valve. Blow into the hose and make sure the valve is closed.
5. Continuing to blow into the extension hose, connect the connector and make sure you hear the valve opening.
6. On the side of the vacuum block, the valve must always be open.
XX adjustment. (tachometer and gas analyzer required)
The adjustment should be carried out with the air cleaner installed and the engine warm! On models with automatic transmission, set the mode selector to position "P".
1. Disconnect the crankcase breather hose from the valve cover and plug the hose hole.
2. Switch off all electrical appliances. Sink manual gas to the end.
After adjustment, reinstall the crankcase ventilation hose. If at the same time the content of CO increases, do not change the settings, as this is caused by the underpressure of the oil in the crankcase. Driving for a long time at high speed will reduce the fuel in the oil and the CO will return to normal.

Addition:
In the field, to get there, without a gas analyzer, you can set it up like this:
1. With the engine running, unscrew the quality screw approximately two turns counterclockwise.
2. Set the number screw to 1000 rpm.
3. Tighten the quality screw slowly until the engine jerks. Then unscrew a little so that the twitching stops.
4. Set the amount screw to 950 rpm.

To prevent the carb from clogging up, I use a fine filter (installed before the gas pump) from injection engines. It looks metallic, a little larger than the usual plastic. The inside of the filter mesh is smaller. With it, you can forget about carba blockages. It is enough for about 50-60,000 km, depending on the purity of our gasoline. If you fill in dirty gasoline, it can quickly become clogged and the engine will jerk. In order not to get up on the road, you must always have a new one in stock. At worst, plastic for 25 kopecks.

On engines with high mileage, over time, air jets and emulsion tubes become clogged in carburetors with increased crankcase gases. This contamination can be seen when replacing the air filter.

I already wrote that my carburetor broke down immediately after purchase. Duck, when I assembled one of the two, then the carburetor needed to be adjusted. I was looking for how to set up the carburetor for a long time and found it. first I found the setting on the audi club website, then I downloaded a book on carbam

LEVEL ADJUSTMENT IN THE FLOAT CHAMBER
Specification 9 + -1mm (plus minus 1mm).
Position the carburetor at a 60 degree angle as shown in the photo and adjust the clearance with the needle valve screw.
I did it with a drill because you can't get there with a ruler. Drills 9mm, I didn’t have only 9.2, so I made a little less.
Angle 60gr
Measurement with a drill

AIR FLAP CLEARANCE.
Specification 4.6 + -0.15mm
In general, there is nothing complicated here either.
1.Close the choke valve fully with the lever.
closed the air damper
2. Press on the traction.
Pressed the traction
3. Measure the distance between the wall and the shutter.
Measured the gap with a drill
Drills 4.6 mm, as luck would have it, I also did not have two drills 4.5 and 4.7 adjusted so that 4.7 does not go in and 4.5 dangles a little there, I think it turned out to be 4.6.

SECOND CHAMBER THROTTLE CLEARANCE
It is adjusted at the factory, but if it gets lost, you can adjust it as follows.
1. The throttle valve of the first chamber must be in its original position.
2

and then everything is according to the instructions of the pictures, I think it is not necessary.
Found on the site of the audi club the author of Nexus

MAXIMUM SPEEDS WITHOUT LOAD. [/ B]
1

Throttle retarder.
1

Check vacuum tubes for leaks.

Lack of voltage indicates an open circuit.
4. Reconnect the voltmeter to the connector pins. Slowly increase and decrease engine speed and note the moment when the control unit is turned on. At a speed of more than 1900 rpm, the voltmeter should show zero, and at 1759 rpm and below, the battery voltage.

Replace the control unit if necessary.

Control valve.
1. Remove the air cleaner, start the engine and let it idle.
2. Disconnect the wires and vacuum tube from the valve.
3

Video (click to play).

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