Do-it-yourself HBO gearbox repair lovato repair

In detail: do-it-yourself repair of the LPG gearbox lovato repair from a real master for the site my.housecope.com.

In gas equipment, the reducer is given the greatest importance among all units. Its task: to provide the driver with an opportunity to lower the pressure that comes from the cylinder. Repair, namely adjustment, on a car's gearbox provides for working with one or two regulators: this is the main difference.

In principle, a gas pressure regulator is a primitive pressure regulator designed to maintain a standard pressure value from the fuel consumption independently. As practice shows, the device supports it with insignificant fluctuations. The pressure decreases slightly with increasing gas flow. This is not a very significant point, but it requires attention.

The Lovato gearbox design is characterized by versatility, simplicity and reliability. For Turkish semi-handicraft manufacturers, the manufacturer is a role model. Almost all generations of Turkish gearboxes have adopted the design of a flattened "drum", on the ends of which there are two stamped covers. Company "OFFICINE Lovato S.p.A." belongs to a family-type enterprise which was founded in the post-war period under conditions of an acute shortage of fuel. In modern conditions, Lovato is one of the leaders in the world market for gas cylinder systems. Repair, namely adjustment, of Lovato analogues depends on the following factors:

generations of the mechanism;
the number of regulators;
fuel system.

Manufacturer's product range:

Reducer propane Lovato vacuum 90 and 140 kW. The device is intended for systems of the 1st generation of LPG on a carburetor type car with a capacity of up to 123 horsepower. The gearbox is intended exclusively for conversion to propane.
Propane Lovato reducer electronic 90, 140, 170 kW. The device is designed for HBO systems of the 1st, 2nd and 3rd generations on auto injection, mono-injector and carburetor types with engine power up to 123 horsepower. The reducer is designed for propane-butane.
Lovato methane reducer. The 2nd generation device is used for converting cars and buses to methane fuel.

Video (click to play).

Repair, namely adjustment, of the gearbox provides for orientation in its settings. Propane counterparts mainly have two regulators, but they also meet with one. Methane type reducers are almost always characterized by one regulator. In their management, these settings are the most problematic.

Repair for the gas generation of reducers with one unique setting involves manipulating exclusively the pressure of the transmitted gas. Vehicle owners with particular enthusiasm prefer to "turn up" the pressure on their own. Having set the only correct and, which is very important, the true value of the pressure, the fuel reducer alone will make it possible to limit the consumption of gas at operating capacities due to an element called the screw of greed.

The repair has some difficulties in the case when the screw is in the "closed" position. To maintain idle speed, in this case, it is required to build up pressure, the process of which includes:

Checking the gearbox before adjusting, namely, whether the "greed screw" is open.
After the implementation of the previous stage, you can start adjusting work.

Gearbox device Lovato

Directly the gas regulator lovato is presented in the form of a screw compressing the spring. In order to install it, you should consider:

when twisting, the gas supply will be reduced by the reducer;
when twisting - build up.

Sometimes screws are found with a left-hand thread, most often it is a right-hand thread. This moment depends on the manufacturer's design imagination. To slightly simplify this task, it is necessary to take into account: for any rotation, the above characteristics of the gas pressure change are inherent in it.

Idling adjustment in vehicles is explained by the degree of shaking of the engine. Its quiet work indicates that the gearbox repair was done competently and efficiently.

So, we start the engine and hold the throttle open. Then we smoothly release it and slow down until the power unit stalls. At the same time, do not forget the condition: the gas reducer of the car engine must continue to work. For "dummies" explanation: the engine will not stall completely if you start turning the throttle regulator in an arbitrary direction. If you see the worst performance of the motor, you will have to change the direction of rotation of the gearbox and restore its stable operation.

Hello. In a previous article, I talked about how to disassemble a Tomasetto AT-07 gas reducer at home. This time it will be about the gas reducer again, and today you will learn how to disassemble the Lovato gas reducer and install the repair kit. The need to disassemble and clean the gearbox arises when certain symptoms indicate malfunctions. How to understand that it is time to clean the gearbox is written in this article.

A set of hexagons and screwdrivers;
Gearbox repair kit Lovato;
White Spirit, detergent;
Rags.

Safety comes first! Before how to disassemble the reducer: find a well-ventilated area, turn off the gas supply, remove the negative terminal from the battery. And most importantly, remove any sources of fire!

1. So, the gas supply is shut off, all safety measures are observed, you can proceed. The first step is to remove the gas supply hoses and dismantle the reducer.

2. Then we take the hexagon “H4” and unscrew the 6 bolts securing the upper gearbox cover.

3. They removed the cover, under which the first membrane is located. We pry on the membrane and remove it in the direction indicated in the photo.

4. You will then have access to the rocker arm. Remove the two rocker arm mounting bolts.

5. Unscrew the sensitivity adjustment screw.

6. Hook the rocker arm with a screwdriver and remove it.

7. Unscrew 4 bolts with a hexagon, then remove the diaphragm and the spring located under the diaphragm.

8. Turn the gearbox over and unscrew the 8 fixing screws, remove the cover together with the spring located under it.

9. Further, by the same principle, remove the membrane.

10. After you dismantled the gearbox, clean it, wash it, and also replace all necessary rubber bands and oil seals. Allow all parts to dry before assembly. Assembly is carried out in reverse order.

That's all for me, thank you for your attention and see you again at the GBOshnik.

QUESTION: HOW MUCH IS GAS CONSUMPTION-AND HOW MUCH-OVER-CONSUMPTION LITERS ON THIS 1.8 MONO-INJECTOR.

Was it weak to connect a gasoline pump from a gasoline valve?

Why do you need to warm up on gasoline and then switch to gas? Now my car did not start on the street -7 from under the gas reducer, the gas flowed and the boiling began in the cockpit, I generally closed the taps on the balcony, what could it be, and as luck would have it, there is no gasoline in the tank what can it be, tell me

Nonsense, I changed a new set, bought a new set for 800 rubles, and nothing helped. And in the end I bought a new gas reducer, right now everything is super. The miser pays twice 😖

There is nothing to break there. If you change the diaphragms and rubber valves on the gearbox, it should work anyway. Only, if there is an electrovalve on the gearbox, check it for operability. Everything should work.Yes, one more trick. When you put the long rocker arm (which controls the membrane of the second chamber), YOU MUST REMOVE THE SENSITIVITY SCREW AND INSTALL THE SPRING THAT IS SUPPLIED INTO THE "PIPTIC" ...

And I just made a return line with a smaller tube diameter (tee) after the gasoline pump in front of the electric valve. And now when I switch to gas, the gas continues to pump back into the tank. And the pump does not dry out and everything works fine.

I read the comments and. I am surprised at the authors of these comments. Some chase all the nonsense that
he himself solved the problem, even if according to the "collective farm", not a specialist and decided to share with such a problem, warning other car owners with just supplied LPG. I think the guy deserves respect.

The story of the gasoline pump is called “the car was mined”. Such master-killers should be severely punished - because of one freak, many people can die, not to mention the material damage. factory, the wiring in the car caught fire when leaving the gas station. The currents in the car are huge and the wiring flashes instantly at short circuit. You cannot blindly trust your life to anyone, especially the work of strangers who are not responsible for anything.

Well, the PPC specialist I can’t understand how it works, I don’t know. it is useless to change these pk, because they do not have that very spring that I “cannot understand” I will not get

hello and thanks for this video, is there a way to make this lovato to give you more extra miles
iam a taxi driver when i work 12 hours i have to put 12 to 13 galons of glp
this is driving me crazy

any help will be appreciated

Who can explain in an accessible way why there is a solenoid valve on the gearbox, if a separate valve is installed before the gearbox?

Which, before the reducer, to filter and shut off the gas during repair. Which is on the reducer itself, for control (brains).

Can coolant penetrate through this gas regulator into the intake tract and then into the cylinders?

put a relay instead of a button, and control the relay, take power from the petrol solenoid valve.

Throw out the petrol valve and connect the wires from it to the relay for turning on the petrol pump. and you will be happy.

Who will answer the thread, you can disconnect the power terminal from the car.

you just need to remove the gas valve. or if your solution is working, then instead of the petrol valve, install a five-contact relay to turn off the petrol pump.

changed the filters and after that, when the acceleration is not great, it switches to gasoline, what can you tell me?

Normal video. Hemorrhage with not turning off the fuel pump was corrected by installing the correct gas-petrol switch button. It is better not to install an additional button, but to turn off the pump from one post. Button with contacts (4 groups). Otherwise, if you give the car to a godfather, you will have to consult him for a long time. Worse are those who have a gas pump on a mechanical shaft. If you turn off the gasoline, then it still works (pumps). Even with the valve closed, he somehow manages to suck (suck) the gasoline a little. Checked more than once. That is, we work on gas and, in addition, we have a very low consumption of gasoline.

Hello. I have a VAZ 2107 I installed myself that year HBO 2 with a TOMASETO gearbox with two screws. SCREW OF QUALITY AND IDLE SPEED I adjusted it everything was great Started up at -15 degrees AND EVERYTHING WORKED. ON THIS VIDEO, ANOTHER REDUCER is ONE screw). A year later, such a problem appeared. It happened that I did not have gasoline and had to start IMMEDIATELY ON GAS. So it used to start at -15 freely. And this year it has become and at -8 WILL NOT START. And now it won't start at all. And it works on gas after I start on Gasoline and switch to gas. I tried to readjust the gearbox again. None of it works. And here's the thing that appeared. I started adjusting the gearbox and drew attention to the fact that the SCREW OF GREEDE (on the first and second chambers that go) I started to twist them a little, the speed drops sharply, the engine bursts does not work stably jerky and now it stalls.I try to twist, thereby opening the channel more, the share of gas also stalls, the whole burst. That is, some kind of adjustment threshold has appeared. This has never happened before. What could it be.
and SECOND QUESTION: how to adjust a gearbox with two screws (QUALITY AND IDLE)

Part 2 -
Gas consumption increased
We are changing the repair kit on the LOVATO gearbox, and also got to repair the gas pump because grief masters installed HBO not correctly.

We are with you again. Today Nail Poroshin solves the problem of NO Idling on gas and gasoline of the VAZ-2107 car. Enjoy watching everyone! ˜ Dear subscribers! Here you will find information about a multifunctional device that allows you to measure fuel consumption, including gas, if LPG is installed on the car, measures the temperature and on-board voltage, and can answer the question “What time is it now?”.

Review of Lovato gas equipment: the installer tells about the features of Lovato LPG, nozzles, Lovato reducer, comparison with other types of LPG. The address of the car service where you can install Lovato LPG: Installation of Lovato LPG takes from 4 hours to 2 days, depending on the complexity of the car. You can buy LPG kits Lovato wholesale and retail in the LPG store:

Consider the Lovato Electronic Gearbox. Design features. Possible malfunctions and remedies.

The idea to repair the LPG gearbox did not arise by chance. Automobile when you press the pedal accelerator for a while did not react, and only then the pickup started and the car seemed to shoot. This problem was only noticed when using gas, there were no such interruptions on gasoline.

So, we have HBO of the first generation Belarusian manufacturer NZGA... For the repair of LPG, or rather the repair of the gas reducer, we only need rem. kit, small tool kit, WD-40 and thinner.

First we need remove the gas reducer from the frame... Before that, we will disconnect the gas supply hose to the carburetor, the vacuum hose and the gas supply pipe from the reducer. Now sprinkle all the bolts with WD-40 so that they can be loosened more easily, and remove the gearbox from the frame.

Further remove the gear cover, for this we unscrew all the screws of its fastening. Under the cover, we can see how everything is dirty.

In order to replace small diaphragm, you need to first unscrew the swing standing above it. The rubber "fungus" on it also needs to be replaced.

So that there are no problems with idling, you need clean the drain hole... To do this, unscrew the drain screw.

Further, all the details are necessary clean and collect... This can be done with a solvent or simple acetone. New parts from rem. we install the kit into an already clean gearbox.

The gearbox can then be refitted. In the photo you can see how badly the old membranes are dirty.

Car owners, from their own experience and budget, clearly feel the systematic rise in fuel prices. Once in a similar position, the only way to save money can be considered the use of gas equipment. Particularly lucky car owners managed to deliver it before the cost increased. They equipped the cars with new systems and set up Lovato's 2nd generation HBO with their own hands. Using the example of setting up equipment from this brand, we will tell you about all the advantages of such a choice.

Correct adjustment of LPG Lovato 2nd generation in the injector and carburetor can be done by hand. In comparison with the HBO of the new model (4th and 5th generations), the HBO reducer of the 2nd generation has somewhat lost its relevance. However, this does not indicate that there is no point in using it. Not at all. These systems have survived on almost all cars. And some experts advise you to put them. This is due to the outstanding qualities of the 2nd generation HBO:

availability and proven quality of the system. As a result, installation work is allowed to be performed on its own;
virtually complete absence of electronic filling, which radically simplifies adjustment;
the possibility of repairing individual components without leaving the garage. Having identified a malfunction, it is not necessary to rush to the service station. With basic knowledge, you can do all the necessary work with your own hands;
affordable price for equipment. The purchase and installation of LPG class is more expensive. The situation with the 2nd generation LPG equipment is quite different. The purchase and further tuning of gas equipment for 2 generation cars in the current circumstances really helps out.

How is it possible to adjust the 2nd generation HBO with your own hands? In fact, the 2nd generation HBO is slightly different from its own predecessor (1st generation HBO). The only difference is that an electromechanical system has been introduced. Through its use, it is possible to coordinate the strength of the gas flow.

Speaking about how to adjust HBO of the 2nd generation, it is important to note that the creators managed to significantly reduce the load on the engine (the gas burns out much more slowly), increase the capabilities of the power unit (oil is stored on the surface of the cylinders), reduce the amount of carbon deposits and reduce the harm from exhaust. By the way, it is the moment described in the last turn that allows the catalyst to last much longer. If necessary, when setting up LPG 2nd generation Lovato with your own hands, the gas supply remains at a certain level.

Attention! The lambda probe emulator is a very useful product. It thoroughly helps with tuning, but only on condition that it is in good working order.

In the 2nd generation Lovato gas reducer, the adjustment has its own characteristics. In general, the gas is sensitive to many important points and changes in the operation of the system. It happens that gas equipment was installed, but then there was an increase in fuel consumption or other problems with the engine. Let's say the car starts to start slowly or stalls regularly. In this case, it is better to adjust the gearbox.

What needs to be done for this? To familiarize yourself with the specifics of the process, you can view the diagram of the existing terminals and control components.

Adjust the electric gearbox. You have in stock regulators - XX pressure (2) and gas volume (2). It is necessary to adhere to the following algorithm of actions:

switch to gasoline, turn on the car and warm up the engine to 95 degrees;
set the speed at around 900-1100 rpm and turn off the fuel supply (in this case, gasoline);
set the initial positions of the adjusting screws: set the dispenser to the extreme mark, turn the regulator XX (2) to the end and then turn it exactly 5 turns, turn the regulator 1 to the end.

transfer control to gas and turn on the car. Set the speed of the power unit to a mark in the region of 2 thousand by means of the suction;
little by little put back the suction and unscrew the XX regulator (2). Do this until you get the best engine RPM. What does it mean? Turn screw 2 until the revolutions stop increasing. Stop when you reach this goal;
operate in the described order until the suction is completely sunk in;
turn the adjusting screw (2) evenly. It is necessary to achieve such a state that the sum of the revolutions becomes presumably the same as when running on gasoline. When adjusting, you must remember that after turning the knob, the reaction to changes is not observed instantly, but after a while. This means that it is imperative to pause.

Adjust the sensitivity of the gearbox. Everything is simple here. Turn the adjusting screw (1) up to a decrease (increase) in the speed of XX (again, do not forget about the delay).Following this, turn the regulator back slightly - by 1.25 rpm. Then try to push the gas properly. Perfect if the car immediately reacts to your actions.

However, here it is important not to forget one more thing. If the adjusting screw "1" has not been tightened well enough, it is preferable to leave it intact. Among other things, provided that the engine capacity is less than 3 liters, then it is also better not to touch the described screw.

Adjust the dispenser. To this end:

set the number of revolutions at around 3500. Accordingly, it is preferable to involve an assistant in the process and ask him to press the gas (do not use the suction). No helpers found? It is necessary to secure the throttle cable using a screwdriver;
turn the adjusting screw until changes in rpm appear. Turn the screw to the left and to the right in order to make sure that all actions were carried out correctly;
turn the screw while the rpm is increasing. As soon as the rotation stops producing results, you need to stop;
from now on, turn the screw 0.75 vol. from the limiting indicator.

call the assistant and ask him to press the gas. Do not forget to turn screw 2 1/4 turn at the same time. There should be a feeling of a slight decrease in speed;
turn the sensitivity screw half a turn;
re-adjust the dispenser.

Measure the level of carbon dioxide in the exhaust. The standard is around 0.35%. Are the numbers too high? Tighten screw XX on the gearbox and increase the air injection (for this, use a special screw on the carburetor). If a reduced speed is observed, the opposite action should be taken.

If possible, in order to correctly configure and adjust the LPG of the 2nd generation, use a lambda probe emulator. It allows you to see to what extent the work has been done accurately. At the same time, you can make any adjustments you need along the way.

A simplified method used when repairing HBO 2nd generation with your own hands (Lovato brand) - the basics of setting (a sensitivity bolt in combination with a greed bolt):

The diaphragm sensitivity bolt is completely screwed in to a slight stop.
Then unscrew the sensitivity bolt 5 turns from the twisted position.
The greed bolt (main chamber) on the hose is screwed in, in turn, to a slight stop.
After that, the greed bolt is unscrewed 3 turns from the twisted position.

Regulation of gas equipment on your own - half an hour's work. Yes, and replacing the gas filter with Lovato 2nd generation LPG is not a source of difficulties either. It is imperative in this matter to remain focused and focused, to avoid rushing, and to follow the practical guidance exactly.

Gas equipment (LPG) has been installed on cars for a long time. This is largely due to the desire for savings, since at almost the same consumption compared to conventional fuel, the cost of gas is much lower. Working on gas, cars emit various harmful substances into the atmosphere much less.Methane or a propane-butane mixture is used as fuel for automobile engines. Currently, HBO is used on a car in several options:

second generation - for installation on old carburetor cars;

third generation - transitional system;

fourth generation and newer - for installation on modern cars equipped with injection engines with a microprocessor control system.

Second-generation equipment has the required minimum of devices and manual switching of types of fuel. The latest generation of gas equipment automatically switches to another fuel when the operating mode of the car's engine changes, depending on the software setting of the control unit.

Consider the most common HBO breakdowns on a car and do-it-yourself repairs.

The most common causes of gas equipment breakdowns in automobiles are damage to joints in gas pipelines, seals and gaskets in gas valves and switchgears.

By the nature of the car's behavior when running on gas, one can judge the location of the damage to the equipment. If the filter is clogged or the gearbox malfunctions, the engine will have unstable idling and dips during sudden acceleration (pressing the gas pedal).

If the equipment connections or gaskets are damaged, you can smell gas. You need to turn off the car immediately and start troubleshooting and repairing.

The location of the gas leak can be determined using a soap solution, which is applied to the sections of the gas pipeline to be checked with a brush or sponge. The fluid will bubble at the leak.

When refueling with low-quality gas, the gas filter may become clogged. It is not necessary to change the filter to auto. It is enough to disassemble it and rinse it in any solvent.

Replacing diaphragms and gaskets in a gas equipment reducer on a car is an easy procedure to do with your own hands. Such HBO repair is performed every 2 or 2.5 years. To replace the gaskets, the dismantled gearbox must be disassembled. After cleaning the inner surface with a solvent, new gaskets and diaphragms are installed, and the gearbox is assembled by hand in the reverse order.

After the car gearbox has been repaired, it needs to be adjusted, which may differ slightly for different models. For self-adjustment, there are two screws on the gearbox - for adjusting the idle speed and a sensitivity screw (amount of gas).To adjust the LPG gas reducer, start the car engine on regular fuel - gasoline - and wait until it warms up to operating temperature. The dispenser on the cylinder should be fully open, the sensitivity screw is fully tightened, and the idle speed screw is unscrewed five turns.Switch the car engine to HBO operation. Maintaining the speed with the gas pedal or the choke knob so that the engine does not stall, turn the adjustment screw from idle to achieve maximum speed. Now, tightening the screw, you need to set the engine speed as when running on gasoline.Next, unscrew the sensitivity adjustment screw until the idle speed begins to change. From the found position, the screw must be returned back by 3/4 - 1.5 turns.The engine should react almost instantly to pressing the gas pedal. To fine-tune the gearbox, you need to rotate the sensitivity screw a small angle in both directions, checking the response of the motor. After achieving the desired result, the equipment repair is completed. Image - Repair of the LPG gearbox lovato do it yourself repair

All adjustment procedures after do-it-yourself repairs must be carried out slowly, since the engine's response to adjustment is slowed down by a few seconds.

Even top-notch technology can fail. A gas cylinder system installed in a car, for example, in a Gazelle, is prone to potential malfunctions, like any other. Inevitably, this probability increases the use of low-quality LPG of the wrong generation, ill-considered installation by incompetent technicians, and, above all, careless operation and non-observance of safety measures.

Before proceeding to a detailed analysis of specific symptoms caused by a malfunction of certain parts of HBO: a gearbox, nozzles, an electronic unit, a cylinder and a multivalve, it is worth noting three accompanying factors:

The desire to save money at any cost is also expensive.The installation by unskilled workers of questionable equipment, even at half the price of the usual licensed middle-generation equipment in a good service center, very rarely leads to something good. Incorrect surface tuning also has serious consequences, which, if ignored, will lead to the failure of the entire chassis in the car.
The most common cause of any problem is the motorists themselves. Lack of understanding and reluctance to delve even into the basic principles of gas operation in a car and individual components, failure to comply with elementary mandatory maintenance procedures, careless and negligent handling of LPG and the vehicle as a whole lead to problems.
The use of low-quality dirty gas will lead to very rapid clogging of the injector filters and multivalve with waste and impurities.

Some of them are highly corrosive, while other resinous substances clog the passage tubes and rubber valve plugs that are difficult to clean. By skipping the next change of gas filters in the car, the owner will bring LPG equipment of any manufacturer and generation to the terrifying state, even with a first-class installation and jewelry tuning.

DO NOT SPEND MONEY ON REPAINING!
Now you yourself can remove any scratch from the body of your car in just 5 seconds.

Some types of breakdowns can be eliminated by simply reconfiguring the computer unit or manually adjusting the corresponding reserve bolts of the injectors, reducer and multivalve. But in most cases, to correct and change gas equipment units correctly, you need considerable experience and skills of an auto repair specialist, not to mention the necessary tools. Thus, it is preferable to repair HE using the services of professionals at a high-quality service station licensed to work with such equipment, or at the service center of an HBO supplier or a car: for example, a Gazelle with built-in Lovato of 4 generations can be easily repaired at the appropriate stations.

A motor operating on equipment of any generation of equipment can become unusable in several ways, which cause:

depressurization;
problems with turning on the motor;
uneven turns during idle;
disruption of a smooth transition in load modes;
drop in engine power and jerky movement;
problems with switching from gas to gasoline and back (the engine stalls, power is lost, fuel consumption increases);
high gas consumption.

The main reason for increased fuel consumption, pops and engine jerks is the loss of tightness of individual components. It is easy to fix it with your own hands, but it is not easy to detect it without special diagnostics, when each sensor is checked. Loss of tightness can cause internal or external leakage, that is, loss of density and gas leakage inside the power system. This nuisance is typical for valve-seat-type locking joints at multivalve valves, and is found among injectors. The pressure will rise steadily.

The risk of an external breakthrough will become a problem - this cannot be allowed, switching the engine from gas to gasoline and repairing without preliminary preparation and cleaning of residues can become too dangerous. Possible clogging of seals and other rubber elements with resinous debris, which car owners indifferent to regular maintenance of gas equipment do not clean and do not replace every 50 thousand kilometers. The valve surface itself can be damaged directly by solid deposits (sulphate crystals, metal scale and shavings).

An external leak or the development of an internal one is also possible, when, having overfilled the fuel system itself, the gas breaks out, a drop in the impermeability of the fuel lines (breakage or damage to hoses and gas lines, seam cracks and strong deformations of the cylinder).In addition to the risk of a fire hazard, a leak is dangerous because portions of toxic gas end up in the passenger compartment.

All connecting hoses and tubes are divided into two categories: with increased pressure (starting from 1.6 MPa) and standard (0.2 MPa). In the first case, it can exist in a car in a liquefied state (from a multivalve to entering the evaporator) and operating states (from a gearbox to injectors).

The most dangerous is the loss of gas precisely in the dense phase - after all, in this phase its mass is more than 200 times greater than the gaseous one, and the volumes of an arbitrary exit will be much larger.

The consequence of depressurization of any level is a complex and dangerous problem for repair, regardless of the generation of the equipment and its manufacturer.

LPG computer units of more modern designs and leading manufacturers, for example, Lovato, have built-in diagnostics of the approximate length of the leak, which works by comparing the data of sensors, pressure gauges, a gas level sensor and outlet fuses for this case.

In difficult cases, the remaining fuel is automatically removed through the ventilation box located on the multivalve cover, in the direction opposite to the passenger compartment.
Those who plan to eliminate the consequences of depressurization with their own hands need to take into account the design features and the nature of the damage. The joint with a nipple or nut, which began to pass streams of gas, can be further tightened, and if it does not help, then cut it off directly with a piece of hose and solder the replacement.

For tapered threads (the same Gazelle is often used), it can be covered with a protective layer of lead litharge or special glue-sealant. A threaded or flanged connection usually achieves tightness through the use of rubber gaskets. Usually, replacing the gasket (which wears out regularly and loses its elasticity, dulls) is enough to continue its full functioning. It is recommended to replace the high-pressure hose as a whole, this is a non-separable connection, and the increased load on the walls will squeeze out any patch. The vapor phase comes across only in the channels of the gearbox, the outlet union of the injectors, the intake manifold and the hoses between them. In all cases, do-it-yourself repair of gas equipment is completely identical, while diagnostics is easier: there is more than one sensor, and the problem can be localized in more detail.

Problems with starting the engine and pops at the time of ignition occur when the gas-air mixture is too lean or rich in one of the components: too much gas in the intake manifold due to problems with the closure of the multivalve or reducer and a leak in the return valve of the mixer.

Depletion of fuel is provoked by air leakage, damaged gas injection channel and blockage of the idle airlock with foreign debris. In the most severe version, the lambda probe sensor is broken. In the event of severe damage to the LPG and leaks from the output of the reducer or the hose supplying the injection, the pressure drops so much that any procedure is terminated and the engine stalls.

Sagging acceleration and gear shifting, idling jumps and increased gas consumption with jerks at the moment of movement due to improper adjustment of the gearbox using screws or a computer program are described in detail in a separate article covering the work on setting up the system. A thorough reconfiguration of the entire controller is required, until nothing terrible happens. In addition to a loose adjustment, such a symptom indicates that, perhaps, the sensor is broken, clogged, or the hose is leaking, the collector return valve is loose.

The dips in engine load after idling and the problem with opening the throttle valves are also the fault of the impoverished fuel mixture.

Is the gas supply delayed, and an uneven injection from the nozzles into the injectors begins (the problem comes across, it happens on a Gazelle car)? This can be dealt with by re-adjusting the opening time of the check valve in the mixer and accelerating the start by selecting the optimal speed. But this will only delay the development of the malfunction into a serious headache, because this is a malfunction of the constipation of the multivalve, evaporator or collector: sticking of the valve to the seat, accumulation of oily condensate and similar events make it difficult to open, it slows down.

If everything is left to chance, then depressurization of the collector unloading may occur due to the strong rarefaction and the complete impossibility of starting the car. To remove the failure, each valve, seat and all assemblies of the manifold and multivalve are completely disassembled and cleaned, excess condensate on the evaporator is removed, the discharge is checked pneumatically for impermeability and, if the result is negative, completely replaced.

A decrease in engine performance in a car is associated with clogging of internal filters, which are constantly clogged with heavy sticky impurities.

Littering of the multi-valve and reducer-evaporator gas locks, intermediate lines and pipes is also possible. All this leads to a depletion of the gas-air mixture and to insufficient injection of the injectors.

Computer diagnostic systems, which are equipped with representatives of modern gas equipment from the 4th generation and above, allow you to diagnose with your own hands as a whole system of any car, be it a Gazelle or another, the state of the units separately and quite well imagine the nature of the difficulty even before dismantling and disassembling. Unless, of course, the built-in sensor or the probe that takes the data is out of order, this already refers to very complex breakdowns, which only professionals can successfully work with. A manual check, for example, with a non-startable engine or a representative of the old generation of LPG equipment, is carried out with compressed air, adjusting the pressure with a pressure gauge and controlling the stroke in the gearbox with your own hands, using it as an improvised sensor.

This is not a complete list of what a professional, well-trained mechanic with sufficient experience and equipment can do with a defective LPG, but we have tried to highlight the most typical and urgent problems that drivers face every day.

Video (click to play).