If the car on gas switches to petrol, or there is no automatic switch to gas at all, several reasons can be distinguished:
Read more about the problem of not switching from petrol to gas here.
VIDEO
In order to understand whether there is an excessive consumption of gas, you should calculate what consumption is optimal for your car. In the article on the gas consumption of Lanos and Sens cars, we described in detail how to calculate the gas consumption rate in the summer and winter periods.
Increased gas consumption can be caused by several factors, namely:
Worn out, dirty or incorrectly calibrated gas injectors.
Clogged or dirty air filter.
Problems with the gearbox (not warming up enough, physical wear, requires adjustment).
The oxygen sensor does not work.
We tried to give the most exhaustive list, although, of course, the article does not contain all the 4 generation LPG malfunctions that may occur during the operation of the car. In any case, if an unstable operation of HBO is detected, it is best to turn to professionals who, in the shortest possible time, will help you find and eliminate the existing problem.
Decoding of error codes for the LPG system Alpha M.
Does not switch to gas equipment alpha 4s. The red lamp is blinking and beeping, and the green one under the letter G is on when the car is turned on gas. Who knows where to dig
The red lamp is blinking and the green one under the letter G that burns when it is running on alpha 4s gas, tell me where to dig? The gas does not turn on
Hello, there is a read_osc sensor error and the connection is broken, what could it be?
Hello Alexey!
Please write to the mail
How to fix the valve break error code?
Hello!
good afternoon, what could be the essence of error 18, if the mains voltage is 14.2 V. Where to look for the reason ?!
Hello!
Hello! How to fix id injector short circuit error?
Hello Damir!
How not to fix error code 11?
What is the question? Errors must be eliminated.
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Modern gas equipment, if selected and installed properly, as a rule, does not cause any complaints. Experienced installers can even boast of successfully introducing LPG equipment into cars that are theoretically unsuitable for gas. Then where do the problems come from?
The fact is that even the best installation wears out after several years of operation, and the adaptation of a car to work on gas, due to its complexity and the need for serious intervention in the equipment, generates high risks of errors during installation. It is the combination of these two factors that leads to the fact that the operation of cars on gas is not as carefree as it seems.Improperly operating equipment not only annoys the driver, but also leads to premature wear of the engine and its attachments. If problems arise, it is not worth delaying the repair.
Typical installation errors most often appear during the first month after LPG installation. Symptoms include: problems with gas refueling (the valve closes too early), incorrect gas level readings, abnormalities in the operation of the cooling and heating system, the "Check" indicator lights up, a drop in power, an automatic switch to petrol if there is a decent amount of gas. However, some problems may appear only after a few years. Then you have to deal with the wear of the fuel injectors, pressure sensor and pressure reducer.
The very fact that, despite the decent costs of purchasing and installing LPG equipment, you have to drive on gasoline is quite annoying. After all, the owner planned to save on fuel. But that's not all.
Most of the presented defects have a negative effect on the condition of the engine. Neglecting the "Check Engine" indicator is a direct path to burnout of valve seats. Ignoring deviations in the operation of the engine cooling system and the interior heater leads to overheating of the block, head cracking and gasket burnout. In this case, repair bills will cost tens of thousands of rubles.
During the operation of a car with LPG, 18 typical malfunctions are most often encountered. Some of them are malfunctions in the operation of the gas installation itself, and others are typical problems that can be expected from a car that is powered by gas for a long time.
1. Loss of coolant.
Signs: the coolant level in the reservoir drops below normal. Topping up doesn't help. The situation repeats itself over and over again. Puddles (drops) may appear under the vehicle.
Cause: when installing HBO, you have to crash into the cooling system. The coolant is used to warm up the gearbox. Leaks most often appear in places of "tie-in". The gearbox itself may leak. It is possible for both coolant to enter the intake manifold and gas to the cooling system.
Repair cost : 1000-6000 rubles.
Signs: the arrow of the temperature gauge enters the red zone, the antifreeze is boiling.
Cause: during installation, the circulation of liquid in the system was disturbed, the system was airy.
Repair cost : up to 1000 rubles. It is necessary to expel air from the system, and in some cases replace pipes and clamps.
3. Jerks the car when running on gas.
Signs: when running on gas, the power will increase unevenly, the car jerks, the engine can hardly keep idling. At the same time, the engine runs perfectly on gasoline.
Cause: perhaps the gas just runs out. In the case of mechanical LPG (I and II generations), the gearbox is likely to be upset, or there are leaks in the intake system. In addition, the gas dosing control stepper motor could be damaged. Injectors can also be the culprit (in the presence of multipoint injection).
Repair cost : it all depends on the cause of the malfunction. A set of LPG injectors together with replacement will cost 4000-9000 rubles.
4. The gas reserve indicator does not work.
Signs: regardless of the amount of gas charged, the indicator shows a value that differs from the actual one.
Cause: the gas level sensor works on a principle similar to the float in the toilet cistern. A jammed float is the most common cause of incorrect readings. Perhaps the reason lies in an electrical malfunction: no contact, short circuit, etc. etc.
Repair cost : most often it is possible to get rid of by tapping on the gas cylinder. If the float comes to life, consider yourself lucky. If not, you will have to prepare from 800 to 2000 rubles.
Signs: regardless of the position of the knob for adjusting the set temperature, cold or lukewarm air is blowing out of the ventilation openings.
Cause: the cooling system became airy during installation.It is possible that the cause of the anomaly is the incorrect installation of the LPG reducer.
Repair cost : removing air from the system will not cost more than 1000 rubles. To change the location of the gearbox, you will have to spend up to 3,000 rubles.
6. Unable to completely fill the gas cylinder.
Signs: the pistol shoots too early.
Cause: sometimes the gun itself is to blame. However, much more often the reason lies in a faulty filling valve. It can be replaced or removed and cleaned. Before going to the service, you should, just in case, try to refuel at another station.
Repair cost : a new valve costs from 600 to 1000 rubles. The cost of replacement work is about 500 rubles. But most often it is possible to get rid of by cleaning the valve - from 500 to 1000 rubles.
Signs: in this case, we are talking about a situation in which the dynamic performance of the car deteriorates from month to month, although initially everything was in order. The engine runs properly on gasoline.
Cause: HBO filters can be the culprit, but not only. In mechanical systems of the old type (I and II generations), the reason may lie in the wear of the gearbox, and in the presence of a multipoint injection system, in malfunctions in the operation of the LPG control electronics or faulty injectors.
Repair cost : filter replacement will cost 500-1000 rubles. In other cases, the costs depend on the specific case.
Signs: there is a smell of gas in the passenger compartment or near the car.
Cause: the gas has a pungent smell, so even a small amount of it is immediately felt. The reason can be both small leaks and a leaky exhaust system. In older systems, due to the loss of tightness in the intake duct, gas can enter the air intake system for the passenger compartment.
Repair cost : everything is assessed individually in each case. The repair begins with a classic check of the tightness of the joints, which will cost about 500 rubles. In some situations, the cost of elimination can reach up to 3000 rubles.
9. The engine does not develop revs.
Signs: at low revs, the engine runs perfectly, but revs up reluctantly.
Cause: the reasons may be different, ranging from prosaic clogging of the LPG filter and a faulty gearbox (or its too low performance), and ending with problems with the software.
Repair cost : to replace the filter, you will need from 500 to 1000 rubles. You will have to pay 10 times more for replacing the gearbox. Diagnostics and tuning are assessed individually, depending on the type of installation and engine.
10. Engine stalls unexpectedly.
Signs: the engine stalls at the most unexpected moment: at an intersection, when gas is released, when braking, etc.
Cause: in older systems, the reason lies in a misconfiguration or improper modification of the intake system. Sometimes it turns out that the gearbox is incorrectly installed. In systems with multipoint injection, such problems are not observed, and if something similar happens, then the cause must be sought in the electronic control system.
Repair cost : repair consists of painstaking diagnostics and precise adjustment. The costs will be from 800 to 2000 rubles.
11. The "Check Engine" lamp comes on.
Signs: the engine malfunction indicator remains on all the time or only comes on under certain recurring conditions and goes out after a few days.
Cause: for some reason, the composition of the sweep does not correspond to the parameters provided by the car manufacturer. The car can be driven, but ignoring the problem threatens to burn out valve seats or damage the catalyst.
Repair cost : for diagnostics, you will have to pay from 800 to 2000 rubles. Further costs depend on the scope of work.
Signs: applies to vehicles with mechanical LPG type for multipoint injection.When starting or accelerating from low revs, a mixture explodes in the intake manifold.
Cause: failure of the ignition system, incorrect adjustment of the mixture composition, installation errors, a very large volume of the intake manifold.
Repair cost : replacement of high-voltage wires and candles, and sometimes filters will be required. For everything, you will have to pay about 5,000 rubles. Additional costs will be required for readjustment and repair of explosion damage. The final cost may exceed 15,000 rubles.
13. Wear of the fuel pump.
Signs: a characteristic hum is heard in the rear of the vehicle. While driving on gasoline, sometimes there is not enough power, the engine runs intermittently and starts with difficulty.
Cause: in some vehicles with LPG, the fuel pump wears out faster than usual. Much depends on the type of equipment and how it is installed.
Repair cost : depends on the model and type of pump. The cost of a new pump is from 2500 to 8000 rubles.
Signs: the engine loses power or runs intermittently. Cannot adjust valve clearance correctly.
Cause: wear of valve seats is accelerated not by the gas itself, but by the lean mixture - the result of incorrect adjustment of the LPG. It is worth noting that the composition of the mixture must be correct not only in steady-state conditions, but also in transient ones, for example, during acceleration.
Repair cost : the repair is very serious and consists in the dismantling of the head and its regeneration. The cost of restoration ranges from 13,000 to 25,000 rubles.
15. Wear of the ignition system.
Signs: the engine with LPG of the old type does not work correctly - “shoots”, stalls. For HBO with multipoint injection, this problem is uncommon, or at least has less severe symptoms.
Cause: Creating a spark in a propane, butane and air mixture requires a higher voltage than in a mixture of air and gasoline. For this reason, the ignition system is more stressed and wears out faster.
Repair cost : for a new candle you will have to pay from 150 to 1000 rubles. The cost of new high-voltage wires is from 2,000 to 20,000 rubles. A conventional old-style ignition coil will cost about 1,000 rubles, and a cassette - 10,000 rubles.
Signs: Corrosion occurs wherever the LPG installer intervened: near the external filling device, under the screws securing the LPG wiring to the body, under the screws holding the gearbox, and also in the trunk - in the area of the gas tank attachment.
Cause: the installation requires drilling holes in the body, which are necessary for fixing the LPG elements. The holes are protected by simple methods - usually sprayed with aerosols, which do not always do their job well.
Repair cost : Sometimes it is enough to clean the damaged areas of rust and treat them again. In extreme cases, you have to move the attachment points to other places.
17. Corrosion of the exhaust system.
Signs: the engine is noisy, you can smell gas, and the exhaust system resonates during speed changes.
Cause: burning liquefied gas produces more water vapor than burning gasoline. As a result, the exhaust system corrodes faster and mainly on the inside. The exhaust system can "ring" and resonate, although upon inspection it appears to be in good working order and tight.
Repair cost : in the case of popular cars, the replacement will be cheaper: from 5,000 to 10,000 rubles.
18. Damage to the intake manifold.
Signs: the engine runs unevenly, stalls, does not idle.
Cause: after installation of LPG, depressurization of the collector may occur in the places where the injectors are installed. In vehicles with LPG for distributed injection, the gas destroys the manifold and other elements of the intake system, for example, the flow meter.
Video (click to play).
Repair cost : it is very rare to restore the manifold or other elements of the intake system.Repair consists in replacing damaged elements with serviceable ones (new or used). It is necessary to prepare for expenses in the amount of 3,000 to 20,000 rubles.
