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DON'T BLAME ON THE INJECTION …

The typical mistakes of owners of cars with injection engines are told by a specialist in power systems.

Andrey SHATALOV

My experience in car service has shown that it’s not just us auto mechanics who need to adapt to modern power systems, but car owners themselves. At first glance, they really have no worries, no troubles with the injection engine, as it is called: know yourself push the gas, not remembering about suction, detonation, dips, sneezing, etc. However, someone who has completely relaxed from the perfection of smart technology (they say, she knows how to foresee everything and takes care of herself) will be disappointed - the car punishes with a ruble. Like, you don’t have a carburetor here, which would have had enough bottles of acetone for washing: put a couple of hundred dollars to replace the parts that were ruined due to sloppiness!

So, what should be avoided for those who have an injection engine in a car?

Firstly, excessive “pedaling”. Reseeding on a modern car, many quickly forget how they once knew how to control gas accurately and precisely - this was taught by a carburetor, which is very sensitive to the air flow rate in the diffuser. And the injection allows even a full opening of the throttle at idle speed - the motor does not jerk and does not choke, however, it will work extremely uneconomically, not to mention the fact that this mode significantly reduces its life due to poor lubrication of parts. Other lazy people go around without bothering to change gears, as if with an “automatic”: fifth gear, an uphill road, and he “drowns gas” on the floor and crawls himself slowly in a dense stream … Then he comes to me and complains about the huge fuel consumption - up to 13 l / 100 km in the city! And this is on a modern injection car with a one and a half liter engine, such as the Daewoo Nexia or KIA Avella! I make a complete diagnosis - everything is in order. After the educational program explaining that the engine “needs to be turned” (during acceleration - up to 4000 rpm), the owner calls and thanks for the science: “There was a miracle - it was within eight liters per hundred!”

Another peculiarity of the unhappy injection wrecker is illegibility in the fuel. At times, only one's own bitter experience forces a person to carefully choose speakers and, having chosen one, checked one, not to refuel anywhere. Moreover, the point is not even in leaded gasoline (today only an abnormal one will be poured into a car with a catalyst), but simply in dirty, saturated with resins. Petroleum products of heavy fractions get into gasoline from “common use” tanks, in which the remains of diesel fuel, fuel oil, and even tar are certainly present … The owners of gas stations also make their fly in the ointment - add diesel fuel to the “76th” gasoline, and the last in "93rd" is considered a completely trivial combination. In general, two more Russian troubles can be safely attributed to roads and fools - sloppiness and theft … And you, the owners, and we, the car service masters, have to disentangle this mess. You take off the nozzle - it is all overgrown with “coal” (see photo) that arose here after the decomposition of the resins at high temperature. Of course, such grimy fuel no longer sprays, but pours a trickle. Due to the incomplete combustion of this unfortunate mixture, the engine power decreases - the driver puts more pressure on the gas than the processor drives crazy: after all, its creators did not expect the car to go to faraway Russia with a completely tarred power supply system. As a result, the engine consumes much more fuel than serviceable, pulls poorly and hardly starts. Rinse nozzles for equipped service is not a problem. By the way, this is often done after the client tried to get by with the “miracle bottle” by mixing its contents with gasoline.

Alas, flushing the power system through the gas tank is almost always harmful. The resinous deposits accumulated there exfoliate and, traveling along the highway, clog tightly everything that is possible. Sometimes the engine simply stalls and does not start anymore due to a cut in fuel supply. Professionals wash the line only in the area after the fuel filter, connecting its outlet hose to a special installation (see. Fig.). In fact, it replaces the standard tank, and its gasoline pump is similar to that put on cars. A special liquid is poured into the tank, capable of not only burning in the engine cylinders, but also actively dissolving resins and varnishes. In Russia, the installations (and the liquid for them) of the American company Vins, costing up to $ 1800, are common, for a small service that has just begun to gain a clientele, perhaps a little expensive. The unit can also be assembled independently, using a pump, for example, from the injection Volga. Of course, he will not last for a long time, but it will cost only $ 30, and will pay off with the first wash. By the way, even Vinsky, designed for the circulation of contaminated liquids, has to be changed annually during professional operation.

Making a flushing installation makes sense not only to the garage entrepreneur, but simply to the owner of the injection machine from the hinterland, so as not to go for service for a thousand kilometers. Well, where there is civilization, it’s probably not worth it to fence a garden: every 30 thousand km is not a sin and pay $ 100. For this money, you will not only thoroughly flush the system, but also adjust it after a complete diagnosis.

The flushing mode usually includes two cycles. The first - 15 minutes when the engine is idling. Then - a 20-minute exposure, during which the resinous deposits are soaked and loosened. The second cycle - 25 minutes with periodic gasing up to 2500 rpm. Sometimes, such running machines arrive that lack two cycles - only after the third all the parameters return to normal.

The gas tank is washed separately. If it is metal, then on the bottom, as a rule, there is a bonk with a drain plug - removing dirty sludge and a portion of washing gasoline will not be difficult. Plastic tank - without a cork and it is necessary to remove it from the machine, and then rinse through the hole for the pump or intake. If such a procedure is neglected, then someday the fuel receiver grid can be clogged with dirt tightly and the pump, working dry, will burn out from overheating (see photo).

Reliable operation of the injection system depends not only on its timely cleaning, but also on the condition of other engine systems. Indeed, we repeat, the developers of modern cars did not set out to ensure their survival on a desert island and were not familiar with the Russian style of driving “to the stop”, changing details only when they were completely refused. Anyone who is still in the Zhiguli used to wear out candles before the electrodes burn out, having bought a modern foreign car, gets dashing: excessively high voltage in the circuit, due to the increased spark gap, destroys sensitive electronics and expensive high-voltage modules.

There are things that are almost harmless to the carburetor engine, but unacceptable for the engine with injection - for example, wear of valve stem seals, causing a lot of oil burn. The carburetor will simply “overwhelm” the candles from oiling or shorting it with soot, and everything will go awry on the injection: the sensors will start to lie, the gasoline that does not burn in the cylinders will get into the catalyst (if there is one), and … if you do not turn off the engine in time, you have to buy not only caps and candles, but something more expensive.