23.04.2018

Elantra has been familiar to motorists since 1990. For more than 25 years of production, six generations of this car have changed. Not many manufacturers can boast of such a beloved C-Class sedan. This is undoubtedly the merit of Hyundai engineers and marketers, who were able to keep up with the times during the entire production period and create cars that meet the expectations of people in different countries of the world. Basically, of everything lineup Elantra no car can be called unsuccessful.

Engines Hyundai Elantra have always been distinguished by advanced characteristics, reliability, high energy efficiency, for which they have repeatedly received high marks from experts and authoritative ratings. In 2006-2007, the car was marked as the most economical sedan in its class. In 2009 it was named the highest quality compact class car.

Engine Hyundai Elantra 2017 model year 1.6 DOHC 16V

Modifications and technical characteristics of engines Hyundai Elantra 1.6 Gamma and 2.0 Nu

The Elantra used engines of 1.6 to 2 liters. At the beginning of the release, the lineup also included diesel units... In the second generation car (Elantra J3) a 1.9 liter diesel engine was used, in the third generation (XD) cars - a 2.0 diesel turbo engine. Unfortunately, very little is known about these units, since they were produced in limited quantities and were not supplied to Russia.

The line of Hyundai Elantra engines originates from Mitsubishi motors, they were installed on the first Elantra, then they were replaced with power plants assembled under license from Mitsubishi, and later they began to use motors of their own design. All units were four-cylinder atmospheric, on the first models with one camshaft, then the DOHC system with two camshafts began to be used. In Russia, Elantra has become most widespread since the fourth generation (since 2006). These machines were equipped with 1.6 and 2 liter engines. In the fifth generation, instead of two-liter engine an engine with a working volume of 1.8 liters was used. Currently, the line of Hyundai Elantra engines consists of two power plants 1.6 Gamma and 2.0 Nu. Each of them can be paired with a manual or automatic transmission.

Features of the Hyundai 1.6 Gamma engine:

• fuel supply system MPI
• aluminum block
• variable valve timing system D-CVVT
• timing chain drive
• ecological class 5 (5)

The power of the 1.6-liter Gamma engine is 128 hp, the torque is 154 Nm at 4850 rpm. The fuel consumption of a car with this engine is 6.6 l / 100 km in the combined cycle (with manual transmission), 6.9 with automatic transmission. D-CVVT means that the phase change occurs on both camshafts... The design does not provide for the presence of hydraulic lifters, therefore, every 90,000 km of run on Gamma series motors, valve clearances must be adjusted.

Engines Hyundai Elantra 2.0 belong to the Nu series. This series of engines was developed in order to fill the niche between the Gamma line and the older Theta, which units are equipped with mid-range cars and crossovers (Hyundai i40, Kia optima other). The main differences from Gamma are the increased displacement and the presence of hydraulic valve clearance compensators. The declared power of such Elantra engines in Russia is 149.6 hp. The torque is 192Nm at 4000 rpm. The fuel consumption of Elantra with a Nu series engine is 7.1 liters per hundred with a manual transmission and 7.2 with an automatic in a combined cycle.

In both the Gamma and Nu series, there are modifications with direct fuel injection into the GDI cylinders, but these engines are not used on the Russian versions of the Hyundai Elantra.
On the one hand, this reduces their power and efficiency, on the other hand, it reduces cost, increases reliability and allows the use of 92nd gasoline.

Turbocharged motor Hyundai elantra 1.6 T-GDI with 204 hp to Russia, unfortunately, has not yet reached

Engine resource, main malfunctions and their elimination

Regarding the resource of the Hyundai Elantra engines, disputes and considerable holivars often arise. Someone claims that it is almost a million kilometers, others, on the contrary, assure that the motors are disposable, cannot be overhauled, which means that they have only a couple of hundred thousand kilometers.

To figure it out, it's better not to guess, but to smoke in the direction of the documentation for the motors. The Gamma series of engines has been known to us for a long time, Solaris with similar motors appeared in Russia back in 2010. The resource of engines from this line, namely, such a 1.6 unit is installed on the Elantra, according to the plant is 180,000 km of run. Few? Actually, yes. The old "eights" from Lada sometimes went more without overhaul, and with it they were almost eternal. But do not rush to get upset, in practice, the resource of Gamma engines, with normal maintenance and adequate driving, can go much longer. Although cars with these engines, which have already managed to run over a couple of hundred thousand mileage, are still few, but among them there are examples with numbers under 250,000 on the odometer and there are no serious problems. But this is only on condition of timely and high-quality service and normal and not too sport driving... As for the 2.0 Nu series engine, as we remember, it differs little from its less voluminous counterpart, and therefore the same can be said about its resource.

Of the main malfunctions of Elantra motors, one can single out:

1. The appearance of a knock on cold and hot after 100,000 km of run, most often this indicates that the valves need to be adjusted
2. tripping, floating engine speed, replacement of candles and a fuel filter usually helps here
3. a decrease in power, gas dips, especially noticeable during acceleration, hint that cleaning of the throttle valve is necessary
4. oil leakage from under the cylinder head gasket, is treated by replacing the gasket, occurs on cars with a mileage of over a hundred
5. stretching the timing chain, a dangerous malfunction, occurs on the Elantra of fans of dynamic driving, in case of detection, the chain must be changed immediately, when it jumps over a couple of teeth, a situation similar to an open can occur, which leads to bending of the valves and the need for overhaul
6. increased oil consumption - not frequent problem, found on machines with big runs, eliminated by replacing the oil scraper rings

In principle, the above malfunctions are not common on only Hyundai models, many of them appear in engines of various car manufacturers. The Elantra motors themselves are quite reliable and, by modern standards, durable, with normal operation and timely operation, they are able to deliver only positive emotions to the owner throughout the entire service life.

Hyundai Elantra 1.6 engine

Buy Engine Hyundai Elantra 1.6

Contract Engine for Hyundai Elantra 1.62010 - present

Engine Model: G4FG

Engine displacement: 1.6

Power in HP: 130-132

Guarantee: 14 days after pickup or pickup in your city. Check the final terms with the manager.

If the Goods are not in our warehouses at the time of order, We will promptly deliver them from the Transit warehouse in 1-3 days! Any Photos of the Units you need - on request! (p.s. If possible Video)

City phone: +7-495-230-21-41

To request a Photo: + 7-926-023-54-54 (Viber, Whats app)

There are NO other phones in our company!

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Delivery across Moscow.

Sending to the region through a transport company!

A complete set of documents.

You buy Units from the largest engine warehouse in Moscow.

All Auto parts sold by our company are tested for performance before being sold.

About company:

Own Warehouse in Moscow

We trade from Stock - Call - Arrived - Bought

We can take a Photo on request of all goods in our warehouses.

Own showdowns in England, USA and Korea.

4 transit warehouses, delivery time 1-4 days

Discounts for shops and services We can send the Goods on an advance payment of 5-15% to your City, and you will pay the rest of the amount upon receipt.

With the question: - We will not throw, we will not deceive, we will not deceive -?!?! - Everything is written above! Either come to visit, or order on a prepaid basis, Appreciate your and our Time.

Engines Hyundai Elantra 4 with a displacement: 1.6 and marking: G4FG in our country among motorists have proven themselves on the positive side. They are appreciated for their reliability, low maintenance cost, and the service life of the Hyundai Elantra 1.6 engine is quite decent. But all the same, no matter how hard the automakers try, during long-term operation problems and malfunctions arise during the operation of the Elantra 1.6 122 unit. Most likely, extraneous noises, whistling may appear, oil consumption increases, vibration will be noticeable, and a drop in revolutions. On the Hyundai Elantra 1.6, you can still extend the life of the internal combustion engine by following a number of simple rules:
- undergo technical inspection and observe service intervals;
- use working fluids recommended by the manufacturer;
- immediately try to eliminate even minor breakdowns;
- warm up before starting the movement;

You should not be hopeful and believe that even an engine overhaul carried out in an excellent service does not guarantee its excellent operation and can save you from all problems. Overhaul is a technically difficult task, it requires a lot of experience and knowledge, the appropriate equipment and, naturally, a good minder. The cost of performing work when carrying out overhaul g4fg often only becomes known after the actual disassembly of the motor. Since even the most experienced technician, when diagnosing and identifying the causes of breakdowns, is unable to identify all worn out parts and damaged units that require replacement. All this affects the timing of the work and their cost, and if the service does not have a spare parts warehouse, you will have to spend your personal time looking for the necessary parts to complete the work. To the above, the repair of the Hyundai Elantra 1.6 unit with the marking: G4FG does not guarantee high-quality and long service of the motor, and at the slightest inaccuracy or error during boring, surfacing, sleeve, assembly power unit and its further running-in, serious problems may arise, it may lose up to half of its capacity and, most likely, new repairs will be required.

On the Internet, a used engine for a Hyundai Elantra is not a problem to buy, since there are a lot of offers. True, many experts do not recommend buying a used g4fg 1.6 engine, since there is a very high probability of getting caught on unscrupulous sellers or scammers. In some cases, you may be sold a unit for Hyundai Elantra 1.6 with a minimum residual resource, the engine could be repaired, and these are not all the tricks that scammers resort to. You may be attracted by the low cost compared to other offers, but saving in such a matter is unacceptable.

The company "AngarMotorov" is engaged in the supply and sale of contract engines Hyundai Elantra 2017, as well as we have been selling repair parts since 2011 and currently occupy almost 40% of the market. During this time, our specialists have studied many aspects of work, we respect all our customers and offer exceptionally high-quality Elantra motors that have passed all tests. Our company cooperates with trusted suppliers from the EU, USA, Japan. All Elantra 1 6 units in stock are pre-tested and computer diagnostics, we offer ICE with a high residual resource.

In order to quickly, without queues and intermediaries, purchase contract motor on Hyundai with volume: 1.6 and model: G4FG, we invite you to visit the largest Moscow warehouse located on Kotlyakovskaya street. Here our experts will help you choose an imported unit from the available ones, advise on all the issues that have arisen, explain how to register. To save your time, we can install the purchased Elantra 1 6 engine in our certified service. It is within walking distance, near the warehouse and provides a wide range of services. Advantages of choosing our workshop:
- highly qualified personnel;
- advanced equipment;
- big square;
- transparency of the work performed;
- the prices will surprise you;

AngarMotorov does not stop there and we are developing every day, opening new branches, sales offices in many cities of Russia. Therefore, if you are not in the capital and want to buy without prepayment and intermediaries Hyundai engine Elantra 2011 with delivery, just call us or leave a request for a call back. After agreeing on the terms of purchase, you will be required to make a small prepayment of 5-10% of the total cost, after which we will send your unit to the nearest branch. Full payment for the order, only after receiving it and visual inspection, you will also receive all accompanying documents, a guarantee and a check. If more information is required, for example additional photos or diagnostic results, our specialists will promptly prepare the necessary information and send it to you.

We are actively developing the sphere of wholesale sales of engines throughout Russia. For wholesale buyers we have excellent conditions and the most low prices In addition, we regularly offer our wholesale customers lucrative offers and a flexible system of discounts. Our company regularly ships orders. We are glad to any productive cooperation, we are waiting for your call!

Kia-Hyundai G4FC engine

Specifications

Production	Beijing Hyundai Motor Co.
Engine brand	G4FC
Years of release	2006-present
Cylinder block material	aluminum
Supply system	injector
Type of	inline
Number of cylinders	4
Valves per cylinder	4
Piston stroke, mm	85.4
Cylinder diameter, mm	77
Compression ratio	10.5
Engine displacement, cubic cm	1591
Engine power, hp / rpm	123/6000 123/6300 126/6300
Torque, Nm / rpm	156/4200 155/4200 157/4200
Fuel	92+
Environmental standards	Euro 4 Euro 5
Engine weight, kg	99.8 (dry)
Fuel consumption, l / 100 km (for Kia Rio) - town - track - mixed.	8.5 5.2 6.4
Oil consumption, gr. / 1000 km	up to 600
Engine oil	0W-30 0W-40 5W-30 5W-40
How much oil is in the engine, l	3.6
Oil change is being carried out, km	15000 (better than 7500)
Engine operating temperature, deg.	~90
Engine resource, thousand km - according to the plant - on practice	180+ 300+
Tuning, h.p. - potential - without loss of resource	140 140
The engine was installed	Hyundai solaris Hyundai elantra Kia rio Kia ceed Kia cerato Hyundai i20 Hyundai i30 Hyundai ix25 Kia soul Kia venga

Faults and repair of the G4FC 1.6 liter engine.

The G4FC engine was developed as part of the Gamma series and first appeared in Kia cars and Hyundai in December 2006. It differs from the younger 1.4-liter brother only in the crankshaft with an increased piston stroke from 75 mm to 85.4 mm. To install the long-stroke crankshaft in the G4FA block, it was necessary to replace long connecting rods for short ones, and also put pistons with a recess to reduce the compression ratio to an acceptable one.
A head is installed on top of the block, which is no different from the G4FA: it is the same two-shaft, 16-valve with one phase shifter of the CVVT system at the inlet. The only difference is in the intake camshaft, otherwise the motors are like two peas.
In the gas distribution mechanism, a timing chain is used, which is declared as maintenance-free, in practice it is very tenacious and does not cause problems.
As you know, these motors are not equipped with hydraulic lifters, which means that every 95 thousand km you need to adjust the valve clearances, if required.
A conventional manifold is installed at the inlet, which does not have systems for changing the length.
The first versions of the engine (before the era of Rio and Solaris), differed in an exhaust manifold in the form of a ram's horn, ignition coils, a fuel rail and minor differences in the head.

Later, namely in 2011, on the basis of G4FC, its successor from the Gamma II series was created under the designation G4FG, which has a variable valve timing system on both camshafts.
Among other things, in Western markets, there are more advanced types of G4FC: with direct injection GDI - G4FD and T-GDI - G4FJ with turbocharging and direct fuel injection.

Problems and malfunctions of KIA-Hyundai G4FC engines

It was said above about the complete identity of the G4FC and G4FA engines, their similarity extends to weak spots, one-to-one drawbacks repeat the 1.4 liter engine. Here all the same noises, knocks, whistles, vibrations at different speeds, floating speed have not gone anywhere and are waiting for you to pay your attention to them. Catalyst problems extend to your engine as well, unless it's a pre-2011 version.
Details about the shortcomings and how to eliminate them can be found in the article about. Given this fact, when choosing a Solaris-Rio 1.4 or 1.6 liter engine, take 1.6, there is never much power, fuel consumption is about the same, the problems are the same.

Engine number G4FC

Look for the designation of the engine number at the junction of the gearbox to the flywheel.

Hyundai Kia G4FC engine tuning

Chip tuning

Carrying out work on the calibration of the motor is the simplest and most harmless thing that can be done in the field of tuning. Companies from this area promise to increase capacity to 130 or more Horse power... It doesn't cost so much money and you can try it if you want, but the result is unlikely to please you.
To get a moving motor, you need to replace the intake manifold with a receiver from G4FG, change the oil dipstick and guide to the same from G4FG, put the control unit for the receiver length change system and you can stop there, having got your ~ 130 hp. However, this is not all and you can remove 140 hp. putting the intake camshaft from G4FG (gets up with modifications), cold intake, exhaust manifold 4-2-1, exhaust with a diameter of 51 mm and adjusting your ECU.
On sale there are Nuzhdin wide-phase camshafts, their exhaust on a 63 mm pipe, a 4-1 manifold, and all this is adjusted on the Corvette control unit, as a result we have about 190 hp. If you want and have money, you can repeat this on your car.

The main parameter of the state of a used unit is an abbreviation translated as used. That is, any product that cannot be considered new, since it has already been in operation for some time.

Buying a used one is definitely a risk that can significantly reduce your costs before buying a new part. And since each unit is given a period for verification and installation, you can always return your funds for the product if it does not suit you. The decision to buy a new spare part, used or to restore is only yours.

WHAT RUN - is, in our opinion, the most popular question when buying. Unfortunately, in all countries, before a sale or a deal in Trade-in, a mileage reduction or "twisting" procedure is applied. The most important and main factor is not mileage, but operating conditions, as well as service intervals (replacement of special fluid and consumables).

PRODUCTION YEAR - this parameter indicates the year and month of the car production. There are methods for the approximate calculation of the mileage for the year, but as practice shows, these are just numbers on which the condition and residual resource of the motor does not depend.

Even knowing the year of manufacture, the unit's mileage, you will not be able to determine the unit's performance.

You can, of course, invent the mileage and in no way confirm it. But our company is not one of those who mislead its customers. The salesperson must be honest with their customers, however.

APPEARANCE is also not an indicator of the unit's performance (engine, automatic transmission, manual transmission). By outward appearance one can only guess technical condition unit, but NOT more than that. You can see the external defects of the case, attachments but not internal wear.

There is an opinion that any motor can be started on a "test bench". The engine can be started outside the car, but only if all the necessary systems are available for a particular engine (engine ECU, wiring, fuel equipment, fuse box, battery, radiator, etc.), I would like to note that they are different for each engine, but universal there is no stand for any motor.

For these reasons, in order to check the engine or transmission for operability, it is necessary, at least, to start the car, give it a load, take a test drive, and this is possible only after installing the unit directly on the car.

Before installing a used unit, it is recommended to inspect and replace rubber technical products (oil seals, timing belts, candles, armored wires, etc.), it is also recommended to replace electronic sensors, attachments, since these elements from transportation defects are not always possible save.

Modern engine or the transmission usually has multiple sensors electronic control which control the operation of the unit in different operating conditions and the failure of one of them affects the correct operation of the unit as a whole.

Can you install with us?

No. We are only a direct supplier of used spare parts.

Order of the Ministry of Internal Affairs of Russia dated June 26, 2018 N 399 “On approval of the Rules for state registration of motor vehicles Vehicle and trailers to them in the State Traffic Safety Inspectorate of the Ministry of Internal Affairs of the Russian Federation, a sample form of a certificate of registration of a vehicle and recognition as invalid of regulatory legal acts of the Ministry of Internal Affairs of Russia and certain provisions of regulatory legal acts of the Ministry of Internal Affairs of Russia "

17. Registration of a vehicle, a change in its registration data associated with the replacement of numbered units, is made taking into account the requirements of paragraph 4 of these Rules on the basis of a contract concluded in accordance with the established procedure or other documents certifying the ownership of the vehicle and (or) frame, body ( cockpit) and confirming the possibility of admitting them to participate in road traffic on public roads in the territory of the Russian Federation.

In the case of replacing a vehicle engine with a similar type and model, entering information into the data banks about vehicle owners about its number is carried out by the registration department of the State Traffic Inspectorate during production registration actions based on the results of the inspection without submitting documents certifying the ownership of it.

Hyundai Elantra 4. Jerks when starting off

Possible causes of the malfunction	Troubleshooting
Oiling of the working surfaces of the friction linings of the driven disc	Remove the driven and driving discs, wash the parts with white spirit or gasoline, wipe the working surfaces of the discs and flywheel. Eliminate the cause of oiling (replace the gearbox or engine oil seal)
The friction linings of the driven disc are badly worn	Replace driven disc
Settling or breakage of the springs of the torsional vibration damper, wear of the driven disk	Replace driven disc
Deformation of the driven disk	Replace driven disc
Loss of elasticity of the driven disc springs	Replace driven disc
Sticking of the driven disc on the splines of the input shaft of the gearbox, severe wear of the splines of the disc hub	If the splines of the hub are severely worn, replace the driven disc. Apply grease SHRUS-4 to the splines of the input shaft of the gearbox
Broken clutch diaphragm spring	Replace drive disc assembly
Defective support of the power unit	Inspect supports, replace faulty

Causes of jerking and vibration when starting off

In most cases, the cause of a breakdown is a malfunctioning clutch.

Correct diagnostics saves time and money, so do not rush to immediately start repairing the clutch and replacing broken parts. Use first simple tips to eliminate disturbances in operation, which may be associated with the fact that the car jerks at the start of movement.

First, warm up the engine to operating temperature. Secondly, make sure there are no problems with the power supply and ignition.

If, after the work done, the jerking when starting off did not pass, then use the list with clutch malfunctions and the methods for their elimination below.

Deformation of the driven disk.
Replace the driven disc.

The hub of the driven disk is seized on the splines of the input shaft of the gearbox.
Clean the splines from dirt, remove minor damage with a file. If there is significant wear or damage to the splines, replace the disc and / or input shaft of the gearbox. Before assembly, apply the SHRUS-4 grease to the splines.

Significant settlement or breakage of the springs of the torsional vibration damper, wear of the windows for the springs.
Replace the driven disc.

Seizure marks on the running surfaces of the flywheel or pressure plate.
Replace the flywheel or clutch cover with pressure plate assembly (clutch basket).

Looseness of the friction linings of the driven disc, severe wear or cracks on the linings.
Replace the driven disc.

Loss of elasticity of the spring plates of the driven disc.
Replace the driven disc.

Other malfunctions

Driving style

You need to start with the obvious. If you are an experienced driver, then you yourself perfectly understand that the car can jerk when starting off in the event of a sharp clutch engagement. That is, if the clutch pedal is released abruptly, then it is quite obvious that the car should go in jerks. In this case, there is no malfunction, and this situation is quite normal. All you have to do is change your riding style. At a minimum, you need to release the clutch smoothly and add more gas. It will come with time. In order for the clutch discs to seize on time, it is necessary to "feel" the seizure moment in your car. To do this, you need to turn on the first gear and try to get under way without pressing the gas pedal. This way you can easily feel the moment when the clutch discs engage.

In cars with automatic transmissions this cannot be, since there is no clutch pedal. In such cars, you just need to smoothly press the gas pedal and not "tear" the car from its place.

Outer and inner cv joints

The next reason, due to which the car jerks when starting off, may be the inner and outer CV joints.
Inner CV joints transfer forces from the box to the car's axle shaft, and then to the wheels, which makes them enough important elements in the suspension system. Considering that these parts are systematically subjected to heavy loads, they can fail. The presence of a malfunction can be determined by the following signs: CV joint turns at the start of movement, backlash. Because of this, the car may jerk when starting off. On the road, the CV joint can knock. Moreover, the road can be perfectly flat. When turning, you can hear the crunch of the outer CV joints, they can also turn when worn and create jerks when the machine starts moving. Outer CV joints most often fail due to driving on a bad and uneven road. It follows that the first malfunction due to which, when starting off, car twitches, CV joints may become. It is they who are first checked at the service station when the driver turns to the master with a similar problem. Replacing these elements is quick, easy and most often does not cost a lot of money when it comes to domestic car, and not about a rare foreign car. Moreover, some car owners can replace the CV joints on their own, for this you will need a hole in the garage, a small set of tools and new CV joints, which are sold in almost any car dealership.

Gearbox malfunction

The second possible reason- Checkpoint. But if the gearbox is not completely serviceable, then you can also observe other manifestations besides jerking at the start: the difficulty of switching any gear, noise from the unit, etc. mechanical box gears, repairing it can be inexpensive. It is difficult to replace any gear in such a mechanism, but it is possible, and the masters at the service station undertake this. In the event of a malfunction automatic box gears the situation is getting more complicated. Repairing it will be expensive. In the event that the variator starts to jerk in the automatic transmission, then the service station most often offers it full replacement, since repair in this case is impractical. It is difficult to diagnose a problem due to which the car jerks when starting off. This can only be detected by service station specialists during a detailed examination of the car and its components.

Steering

Steering rack in the presence of malfunctions, it may well give jerks when starting to move. Worn out elements this mechanism usually they are not repaired - they are replaced with new ones. Also, the tips of the steering rack can freely dangle in their positions, which will cause jerks during a sharp increase in speed and during braking. In this case, the steering wheel beats. Damage to the steering column cannot be ruled out (this usually occurs during an accident), which can also create jerks when moving or starting off.

If the steering mechanism is malfunctioning, the driver should feel vibrations in the steering wheel, and not just jerks when starting off. Again, there is nothing to advise the driver about self repair... Understanding the steering mechanism is no easier than understanding the gearbox system. So you have a direct path to the service station.

Engine

Unfortunately, if the car jerks when starting off, the engine can also cause a similar phenomenon. Moreover, this may be due to its different systems. A distinctive feature of a motor malfunction is speed surges. crankshaft, which is easy to see on the tachometer. In this case, the motor may not obey the driver well: do not react to pressing the gas pedal, make noise

It is quite difficult to diagnose what exactly causes jerks. The problem may be in the fuel injection system. For example, if the injectors are clogged, then fuel will flow into one combustion chamber, but not into the other. Disproportionate mixing of fuel with air can also be carried out, which will cause jerks not only when starting off, but also when driving on a flat track

Crankshaft and fuel

Crankshaft wear can also cause this type of malfunction. In this case, the movement of the car is accompanied not only by jerks, but knocks. Poor fuel quality can also cause jerky starts. Some engines are sensitive to gasoline, so it is worth trying a better fuel at a different gas station and see if a similar problem occurs when you change it. The problem may go away. Judging by the reviews of car owners on the forums, the malfunction really often lies in the low quality of gasoline, but this phenomenon is rare.