DIY repair of gas injectors omvl

I am glad to welcome everyone to the GBOshnik, a site dedicated to gas equipment and everything connected with it. Today, dear friends, I want to share with you a photo report on how to repair gas injectors with your own hands. You will learn how to install the OMVL gas injector repair kit yourself using a simple tool at hand.

Problems with injectors are fraught with interruptions in engine operation, unstable rpm, jerking while driving, poor start-up, increased fuel consumption, etc. In addition, “Check Engine” often appears on the panel, which indicates a malfunction of the LPG. OMVL gas injectors, in principle, can be called reliable, they are of fairly high quality and can easily “plow” about 100,000 km. No core problems, in winter they “don't stick” and work quietly compared to others.

The solution to this problem is quite simple, you need to buy a repair kit for gas injectors and repair the LPG injectors.

1. The first step is to dismantle the injector fuel rail. To do this, first we shut off the gas supply to the multivalve and disconnect the battery terminals for every fireman.
2. Then we take the fuel rail and proceed to disassemble it. As a rule, everything is described in the instructions for the repair kit for gas injectors, so there is nothing complicated. Carefully dismantle the upper fixing bar, for this you need to pry the edge, then pull it up.

1. Now you can remove the coils, which, in fact, are not fixed in any way, but are simply dressed on metal rods (rods).

1. Using a screwdriver, unscrew 5 screws, after which we separate one part of the ramp from the other.

1. We start disassembling the injectors. We take out the old sealing rings, as well as the springs, and then install the OMVL gas injector repair kit.

1. Before installing everything, you should flush the working parts in gasoline or use a carburetor cleaner. Cotton swabs and discs will also help flush the gas injectors.

After the work is done and the gas injector repair kit is installed, you can proceed to the final stage - the assembly stage. As you can see, repairing gas injectors with your own hands is not so scary and quite realistic. After the final assembly, all of the above deviations in the motor should go away. If the problem persists, I recommend that you seek help from experienced specialists. It also does not hurt to calibrate the gas injectors after installing the repair kit.

That's all for me. If it's not difficult for you and you liked the article, please share this article with your friends on social networks, thereby you will make your contribution to the development of our project. We will be grateful for every repost, let good people read good articles! All peace and kindness. Till!

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Andryukha73rus 07 Mar 2010

What color do you have, blue or black? I also began to troit on a cold one, 1 and 4 nozzles do not turn on at all for about 10 minutes, then they turn on and crack. on the highway more than 80 km / h you dial and turn off the 4 cylinder.

It was buggy for me too. It turned out to be not the case. But simply the reducer did not warm up to normal temperature and the gas was blown not in a gaseous state, but in a liquid one. I redid the heating from the stove and began to shove (and before that, more than 70 was in no way-showed misfires)

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Andryukha73rus 09 Mar 2010

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vingod 09 Mar 2010

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Andryukha73rus 09 Mar 2010

on this HBO I have already passed 100000 km. a strange feature, it was warm for a week, the nozzles of my brain soared in the morning, today the frost hit, so it switched to gas without any problems, not a hint of omissions.

so why shouldn't I go there myself?

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Andryukha73rus 09 Mar 2010

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Andryukha73rus 09 Mar 2010

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Andryukha73rus 09 Mar 2010

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balu833 13 Mar 2010

I went to the service, the gas pressure was low, the type membrane stretched out.

yes, in the service, the repair of gas injectors is 150r apiece, but the most deficit is the springs on the injectors, and so I installed the equipment myself and adjust it myself

I have the same problem. The nozzle clicks. Disassembled but did not find the damper ring. Valtek injectors. Tell me where it is installed. And if you can take a photo.

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Andryukha73rus 30 March 2010

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Andryukha73rus 09 Apr 2010

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Andryukha73rus 12 Apr 2010

they propose to replace the entire ramp from OMVL, it costs 2500r. who faced, Lovatovsky's brain will not kick?

look at the resistance, if the same, then he will not notice

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Andryukha73rus 12 Apr 2010

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Andryukha73rus Apr 16, 2010

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denisgbo 26 Oct 2010

you can go if the injectors knock.

Did you start knocking or did you keep knocking with novya all the time? What are the nozzles?

It so happens that the resource of one or several gas injectors is coming to an end. This is manifested in the fact that the machine, when operating on a gas mixture, begins to triple, there is a loss of power, unstable engine operation and a characteristic "clatter" of one or more gas injectors. It is this "clatter" that appears after the wear of the O-rings and rubber bands on the rods and means that it is time to repair the gas injectors.

Repair of VALTEK gas injectors implies several simple steps, namely:

• removing the ramp from the car;
• disassembly of the ramp and all its components;
• replacement of rods, springs and rubber rings with new ones from rem. kit;
• subsequent assembly of injectors and their adjustment;
• installing the ramp back to the vehicle.

First of all, to remove the ramp from the car, you should shut off the gas supply to the LPG main by shutting off the flow valve on the gas cylinder.

• To exhaust all the gas from the main, for this, with the valve closed, start the car and wait for the switch to gasoline, then forcibly switch the system to gas operation two or three more times.
• Before disconnecting the wires and removing the ramp, it is imperative to outline which wire belonged to which of the gas coils. This can be done with a marker or colored tape. When assembling, you must accurately determine the belonging of the wire to this or that coil.

• Unscrew the fasteners and remove the ramp. When unscrewing the clamps, you will hear the release of gas residues - this is a normal situation.
• Unscrew the calibration jets with a 12 key.

• Remove the corkscrews by folding them neatly so as not to get lost. Remove the coils. If you made notes with a marker on the coils, mark which coil was in what place so that you do not confuse them during assembly. If you made notes on the ramp itself, the order of installing the coils can be disregarded.

• Using a 14 wrench, unscrew the guides and carefully remove them. If one rod is replaced, during disassembly, it is imperative to designate a pair of rod - seat, so that they do not mix up during assembly. If all parts are replaced, then the order may not be followed. Remove the rods and springs from the guide.

• Carry out a visual inspection of the rods and rubber bands to determine if a repair kit should be used or not. If the rubber band is completely worn out, metal-to-metal contact occurs, resulting in a characteristic "clatter" sound.

• If the rod itself has a satisfactory appearance, you can replace only the rubber band and the spring (also in case of wear), for this, remove the old rubber band from the rod with a sharp object (awl) and put a new one in its place. If the mileage of the injectors is significant, the stem should also be replaced.

• Carefully inspect and replace worn parts with new ones on all injectors, and then reassemble the ramp in the reverse order.

Read how to do it yourself here!

Driving gas-fueled cars, drivers often encounter incorrect operation or LPG breakdowns. The efficiency of this equipment largely depends on the health of the gas injectors. Their operation takes place under conditions of exposure to high temperatures, and sometimes low-quality fuel.

Owners of vehicles running on gas are advised to know how to repair, clean and adjust the 4th generation LPG gas injectors with their own hands. This will help in some situations and save money.

Gas injectors are special LPG units that are responsible for the dosage of fuel, in fact, they are high-speed valves. Thanks to their correct operation, the required ratio of the gas-air mixture in the internal combustion engine is ensured. Such mechanisms began to be used in the 4th generation of HBO.

Some of the most popular are stock models from Valtek (Valtek), Rail (Reil), Digitronic (Digitronic), OMVL (OMVL), Lovato (Lovato). Their undoubted plus is that they are easy to repair, which consists in flushing, replacing a repair kit and adjusting, in contrast to non-separable injectors like BRC (BRS), Barracuda (Barracuda) and the like.

Symptoms of a malfunction of one or more injectors may include:

1. high fuel consumption;
2. deterioration of the dynamic characteristics of the machine;
3. unstable engine operation, troit of the internal combustion engine (one or a pair of injectors does not work);
4. failures when pressing the gas pedal;
5. malfunctions of various sensors, appearance of “Check engine” errors (for example, MAC sensor);
6. knocking in the nozzles (loudly "clatter");
7. gas leaks through injectors (pouring / poisoning);
8. the car stops idling, the injectors do not turn on.

The reasons for this may be:

• wear of damper rubber rings on the valve stems (because of this, the nozzles knock);
• development of the seat (seat) of the valve or its locking rubber;
• wear of a rod (also called a piston, an anchor) or a liner (aka a core, a cylinder, a bulb);
• jamming of the anchor in the cylinder;
• weakening of the elasticity of the piston return spring;
• failure of the electromagnetic coil (solenoid);
• violation of the integrity of the wiring.

All of the above reasons may appear naturally or due to low-quality parts, untimely maintenance of gas equipment, violation of the rules for installing injectors. So, for example, without replacing the LPG filters on time, gas condensate (oily liquid, water, dirt) can get into the nozzles, which can cause their wedging or accelerated wear.

Also, the horizontal position during installation affects the uneven wear (ellipse) of the sleeve body and stem. And the banal non-observance of the rules for installing wires (twisting instead of soldering, mixing up, improper fastening) can cause problems over time.
One way or another, but nozzles of this type rarely live up to 70 thousand km. mileage without repair (change of a repair kit). It all depends on the conditions of their operation.

A detailed check of the gas injectors (injection / opening time, throughput) is possible only when connecting diagnostic equipment, as well as after dismantling the entire ramp and checking it on a special stand in a car service. Or build a homemade stand.

It is possible to independently identify which injector does not work and the presence of leaks (tightness) is possible only by alternately disconnecting the connectors / chips and removing the hoses from the outlet fittings. It is highly discouraged to use such methods!

To repair the 4th generation LPG injectors of the Valtek or OMVL type, for this you need to remove the entire rail assembly:

• shut off the gas supply to the cylinder. To do this, you need to turn on the corresponding valve of the multivalve;
• start the engine for a while to use up fuel residues from the system;
• disconnect the battery terminals;
• disconnect hoses and power supply;
• by unscrewing the vibration dampers, remove the gas train.

In order to disassemble and flush the nozzle (consider the example of Valtek type 30), you need:

1. using a 12 key, unscrew the calibration jets / nozzles from the bottom of the ramp;
2. use round-nose pliers or a screwdriver to remove the locking rings of the coils;
3. dismantle the coils;
4. unscrew (key 14) the valve cores and remove the pistons from them.

Next, you need to check for wear: rubber parts, valve seats and stems with sleeves.

Important! If it is intended only to clean the gas injectors, without replacing parts, it is imperative to assemble all the elements in their places without confusing them. Also, in this case, it will help to extend the life of the nozzles - if you turn over the spilled locking rubber bands on the rods.

Carry out a defect identification of parts. Identify the squeezed rubber rings, bumpers and seals, also check the cylinders and anchors for wear. The valve elastic should not have large recesses from the seat. The saddle also shrinks over time. Discard unsuitable parts.

Then clean the parts of the nozzles from dirt deposits, it is convenient to do this with a rag, cotton swabs. Using a carburetor cleaner (carbokliner), acetone, gasoline or other similar products.
Rubber products (if it is decided not to change), you need to remove, it is impossible to wash them with aggressive substances. Rubber can swell from such compounds. For the same reason, it is not advisable to clean / rinse nozzles (non-separable) such as Hana, Barracuda, Brc, the effect of such cleaning is enough for a short time, if at all they will work after that.

A repair kit for gas injectors, as a rule, is completed only with rubber products (RTI), a rod and a spring, for one injector or the entire ramp. You can also buy a complete set of parts (rods with core bodies and return springs assembled). It happens all separately. On average, the price of a standard repair kit for one rail will be about 500 rubles.

Based on numerous reviews from drivers, for Valtek injectors, and this is LPG Tech, GREEN GAS (Green Gas), Atiker (Atiker), WentGas (Ventgas), Tomasetto (Tomasetto), Yota (iota), Digitronic (Digitronic), even Lovato ( Lovato), original RAIL repair kits are best suited.

The peculiarity of the r / c is that their piston has a hole in the body, this solution reduces the effect of the syringe. If the choice fell on another manufacturer, you should pay attention to the lack of magnetic properties of the metal of the parts (this should not be), dimensions, weight.

The whole replacement process consists in assembling the block of mechanisms in the reverse order:

1. if the pistons are not changed, then remove from the seats on the rods and replace the rings (rubber dampers / bumpers);
2. install (new / old) anchors and return springs in the sleeves;
3. change the O-rings of the stem stroke adjusting screw, as well as under the coil and core;
4. screw the sleeves into the rail;
5. put on coils, retaining rings.

It is recommended to use all seals once. Calibration outlet / nipples do not need to be installed at this stage.

The adjustment of the 4th generation LPG gas injectors of the Valtek type is reduced to adjusting the stroke for uniform dosing of fuel.

There is a calibration option, using a factory or home-made stand for checking and calibrating gas injectors; not even all service stations have such equipment.

Do-it-yourself calibration of gas injectors is performed with a micrometer device with an extension sleeve / sleeve and a thread on it corresponding to the thread of the dosing nozzle, it is also a dial indicator with a scale of 0.01 mm (it is completed with depth gauges, bore gauges).

You will also need a 4-12 V power supply (for example, a battery or a power supply), a piece of wire with a connector to the injector and a button for a short-term impulse so that the injector coil does not burn out (remember that the solenoid resistance is 1-3 ohms).

1. fix the micrometer to the ramp;
2. make sure that the indicator rod touches the injector armature;
3. apply power to the coil for up to 1 second (ideally, you first need to run several cycles to warm up and shrink the damping rings);
4. set the value on the device to 0;
5. in this way, adjust the plunger stroke. By turning the core screw clockwise, the gap decreases, counterclockwise - increases. It is necessary to achieve the same values ​​on all valves.

Below is a table for calibrating the armature travel of Valtek gas injectors, depending on the power of the power unit:

After some time valves started to work loudly, while the engine worked fine, flawlessly. But a few days ago, when switching to gas, the engine began to triple, and the ChecK Engine caught fire... At the same time, the engine runs flawlessly on gasoline. It follows from this that all the blame for HBO, namely the injector valve.

One of the nozzles clicked very loudly... By disconnecting the coil, it became clear which cylinder was not working. In order not to contact the masters and not pay, I decided to repair the valves of the LPG gas injectors with my own hands.

To do this, first I had to disassemble the injector valve... At the same time, it turned out that the locking elastic band located on the core was intact, but damper ring worn out, which led to the fact that the core was constantly knocking with metal on metal. On the rest of the valves, the damper rings were in order, only on the inoperative cylinder the ring was worn out. After that I decided to replace the damper ring, in the hope that it would help. Rem. the kit costs about 120 rubles, but we managed to find it directly damper rings 5 ​​rubles apiece... After the purchase, I replaced the ring on the inoperative valve, started the car, switched to gas - everything works perfectly, there is no clanking sound, the engine does not troit.

It's obvious that a worn out damper ring directly affected the quality of the core rebound, and as a result, the electronics turned off the valve that was not working correctly... In my case, the gas train served 37.5 thousand km without repair.

This is how the HBO injector valve was repaired with our own hands.

This material was taken from one of the specialized forums, its reliability has not been confirmed.

Very often installed on a car 4th generation gas equipment, users are not happy with the fuel consumption or the vehicle's performance. This forces you to go to the service center for additional LPG adjustment... It's good if the masters understand how to solve the problem. There are situations when driving LPG adjustment there's no point. This happens if the installer's employees do not understand well in principle settings, and it is not uncommon to find a generally absurd opinion - the autotuning of Italian systems solves all problems. No autotuning will make the minimum - so that the car does not at least stall. Rest settings must be carried out manually using diagnostic equipment.

It has been said, written many times, and the most important thing is in all instructions for automobile gas equipment - if it is correct tuned HBO 4 generations the petrol injection time remains the same when running on petrol and gas. It is the job of the tuner to make sure that the injection time does not change. HBO... For example, refer to the instructions for gas equipment of the 4th generation OMVL – Fuel card setup... We read from the point 4.4.1 Modify the map. And the rest of the systems are no different. This is the main thing.

1. To configure having only a cable for LPG adjustment by changing the injection time. If you have to use this option, then it is easier to use older versions of programs where there is a rough HBO setting by load.

2.Adjust with the fuel trim diagnostic scanner. If you have a diagnostic scanner or adapter, it will be convenient to configure it with any program.

I will clarify what is the load on the engine. For many, an increase in load is an increase in revs. This is fundamentally wrong. If you push the throttle to the floor in neutral, the revs will skyrocket, but the load will be at its lowest. The load is proportional to the injection time, and therefore to the discharge in the manifold (more air is required to burn a large amount of fuel, therefore the vacuum in the manifold is proportional to the load).

Favorite section of settings for most installers. In principle, this should always be the starting point. Autocalibration is a fairly simple operation, the control unit remembers the petrol injection time. Switches to gas. And it adjusts the coefficients of the fuel map in order to repeat the petrol injection time on gas.

Only there is one big BUT. The whole map is changed according to the data of one cell. That is, for example OMVL changes the entire map of coefficients for the minimum load cell at 3000 rpm. LOVATO changes the whole map at idle. This is necessary for the vehicle to be able to travel for tuning while in motion. There is no question of any 100% setting of all revolutions and the entire load.

LPG adjustment by load implies a change in the cells not in terms of revolutions, but in terms of injection time. That is, you memorize the petrol injection time at a certain moment of movement (for example, 3 ms), switch to gas. See how the petrol injection time changes (do not change driving conditions and effort on the gas pedal). Compare with gasoline readings. For example, it turned out 4 ms, but it was 3 ms. This means there was an increase in injection by 33%. If the petrol injection time while running on gas has increased, this means the mixture is poorer than necessary. And it is poorer by 33%. Now we change the entire line of 3 ms to +33 units, and so on throughout the load.

Manufacturing companies HBO until about the middle of last year, they closed the odds map in their programs and left only a rough one in the public domain. customization by load. Rough adjustment the load looked like 8 cells, where the coefficients were entered. These factors were applied to the fuel card. The first column of 4 cells was responsible for the idle run. The first cell changed the 1000 revolutions map column from 2 ms to 3 ms; 2, the cell changed from 3.5 ms to 6 ms, and so on. Cells of the second column of coarse adjustments changed the map in all columns except 1000 revolutions. That is, everything except idling.

For clarity, I made screenshots of the old version of the program.

Program odds map OMVL... I specifically changed all values ​​to 100.

Cells settings in terms of load, they were gone with version 6.

We introduce correction factors into the rough customization.

Let's see what happened to the odds map.

It shows well how it works. customization by load. At adjusting in terms of injection time, it will be easier to use exactly the old version of the programs (5.0.5 or 5.0.8).

The tuning method discussed earlier is not convenient when tuning in motion. It is very difficult to keep your foot in one position and finding a road with a perfectly flat surface is also not always possible. It was more convenient to record the data and analyze it after disconnecting from the car. First, we record driving on gasoline, then on gas. We compare the injection time. But this is where the difficulty arises. How to compare injection times in different operating modes? To do this, you need to synchronize the data when driving on gasoline with the data when driving on gas according to the readings of the MAP sensor.

The MAP sensor shows the collector vacuum. Its readings change as the load changes, but do not change if the coefficient is incorrectly selected in the LPG tuning program. For example, when running on gasoline at idle, you have an injection time of 3 ms, a vacuum of 0.3 atmospheres.Switch to gas, the injection time becomes 4 ms, but the MAP sensor readings do not change and 0.3 atmospheres remains.

To use this principle, you need to use the signal registration tab in the setup program (item 6.1 Acquisitions).

1. First, you need to drive about 100 kilometers on gasoline so that the fuel trim is back to normal.
2. Record data when driving on gasoline, save it.
3. Write down what the manifold vacuum is equal to at the injection time used in the HBO program (2, 2.5, 3, 3.5, 4.5 ms, etc.).
4. Record data when driving on gas, save it.
5. In the gas data, look at the MAP readings and use them to determine how long the petrol injection time took.

For example, you need to set up a line of 3 ms, see how much MAP is equal to 3 ms when driving on gasoline, for example 0.3. See how much the petrol injection time when driving on gas at MAP 0.3, for example 4 ms. This means that in line 3 ms the mixture is 33% lean, add 33 units.

This principle is remarkably implemented in HBO. Digitronik... The program collects data and builds a schedule of work on petrol and gas. It immediately becomes clear where to add, where to subtract. In simple blocks, you can see only load curves - 2D map. In more serious blocks, you see a 3D map, in it you can see the change in injection relative to the load and rpm. Because of this feature, I recommend everyone to use Digitronik control boxes. For their settings only the cable is enough for HBO.

For the convenience of processing the recorded data, you can use a spreadsheet processor - Excel or Calc (OpenOffice). I will tell you how to do this in another article.

The most correct option is 4 generation LPG adjustment using a diagnostic scanner. The diagnostic scanners show the vehicle ECU fuel trim (FuelTrim). Fuel trim displays the injection deviation from the norm as a percentage. Again, the readings of MAP and MAF sensors and a table of reference values ​​of injection times at certain readings of these sensors are most likely used. When the injection times deviate from the reference, the correction is shifted from 0. For example, the same example with 3ms when running on petrol and 4ms when running on gas. The correction will be 33%.

The essence settings according to the diagnostic scanner, it is reduced to the selection of card coefficients in such a way that at any load and speed the correction does not go beyond + -5%. At first, I would recommend adjusting the card only for load, and then see if there is any difference in rpm. Usually it is enough to adjust the load only.

The convenience of using the scanner is that you do not need to calculate deviations in your head. It helps a lot with at the construction site in real time. While driving, you see a map of coefficients and fuel trim readings. Enter the correct ratio instantly and watch the car's reaction. If you are using not a full-fledged scanner, but an OBD adapter with a laptop, then the data can also be recorded and processed later. Again, tied to the MAP sensor.

I will describe the processing of diagnostic program data in a spreadsheet processor, using Digimoto 5 version as an example, in the future.

Device and car repair> Repair and maintenance> Self-repair of LPG gas injectors for a car

Gas equipment is currently in great demand due to economic instability and the constant growth of gasoline.

The correct operation of this entire well-established system is set by the LPG injectors. Their job is to open and close the piston in time to supply fuel to the engine.

However, quite often this part fails, thereby stopping the operation of the entire HBO. To establish the mechanism, they need repairs.

To decide how to make it yourself, you need to find out what are the main failures of the nozzles and how to fix them.

So, one of the most basic reasons due to which a gas injector can fail is the use of low-quality fuel with a large amount of various impurities.

They contaminate the nozzle and prevent it from performing its functions properly. To avoid this, due attention should be paid to the choice of filters that protect the nozzles from contamination.

To remove dirt, clean the nozzles using a special stand, disassemble or calibrate them.

In addition, the cause of the breakage of the injectors is the unbalance of its rail. This most often leads to improper motor operation.

To eliminate this problem, you also need to clean the nozzles, calibrate them, and in the most extreme case, if it is impossible to make repairs, replace the part.

It is necessary to constantly monitor the condition of the gas injectors, periodically cleaning and replacing them. Since without such manipulations, professional repairs will be expensive.

Also, you need to visit a service station to diagnose gas equipment, preventing the formation of various breakdowns in it. It is recommended to carry out such diagnostics once every 10,000 km.

I would also like to note that not every HBO breakdown can be determined independently. There are those that can only be diagnosed by high-profile specialists.

They, with a lot of experience, determine them by ear or on a special electronic stand.

There are also problems with an open circuit and a short circuit in the coil, the so-called electronic malfunctions of injectors. If this does happen, repairs will not be enough here.

This will require a complete replacement. New HBO are equipped with a self-diagnosis function. Such a system itself notifies the driver about the presence of any malfunctions. This allows him to immediately resolve the issue with their repair.

It is also worth paying attention to the manufacturer of the nozzles and their cost.

Cheaper products quickly lose their original characteristics and require a quick replacement, which leads to unnecessary costs. Keep an eye on your car and it will repay you with quality work.

Also see the video below for the process of calibrating gas injectors.