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Many people buy a second-hand car performance, will not wait to experience acceleration performance, but after the actual test, some second-hand car to buy food even performance cars do not like, after 10 years of use as our private cars 10-15 percent reduction in approximately the same horsepower. Exactly what reason will steal the original horsepower engine in the process of using it? If you want the car revival focus what should we do? Please read on!
There are four factors that affect the engine power old car, namely air system, fuel system, a cylinder and a spark plug, let the first less impact air system to begin with.
As many old car owners will not be as attention-hand like just bought a new car in terms of maintenance, such as replacing the air filter is not in cycles, eventually leading to an air cleaner the filter is clogged, the engine can not be naturally cool to the intake air. And for the engine, and the air is actually proportional to the amount of fuel injection, when the ECU detects that the air flow does not meet the design requirements, fuel injection will be reduced, thus affecting the vehicle horsepower. Fortunately, this problem is relatively easy to solve, as long as put a new air filter is enough to restore the car horsepower.
Having intake in relation to said exhaust gas, and since the engine through the intake, work to generate power, the exhaust gas that is burned off naturally discharged required line . However, since the requirements of increasingly stringent emissions regulations now, catalytic converters will greatly affect the degree of vehicle exhaust efficiency of the vehicle. And with the deposition time, ternary, will gradually be clogged within the exhaust gas and the gasoline additive oil, dramatically influence the final exhaust efficiency. After
Further, since the three-way catalyst is not as belonging to the air filter as “consumables”, so many people find power down, which will not go TWC aspects to think about. Fortunately, replacing the “Three” is not trouble for End after the effect is immediate.
both air filter or “Three”, are all relatively easy to replace parts, but going to say will affect the power of old car parts, repairsReplace it may not be so convenient. As a key part of the structure of the engine valve, the valve is actually affect engine operation important part. With the growth engine running time, the valve lift will gradually change because of wear and tear, and even if you are using a top-oil, also can not avoid valve wear.
When the valve wear, because the relationship between the lift and the gap will change, with the engine running, the wear of the valve can not be that release enough air, like a new car into the the combustion chamber, vehicle power naturally declined.
finished with aspects related to air, we look at aging as the fuel system, which in the end will affect parts of the vehicle power. The first is the injector! Whether it is the old car’s manifold injection, direct injection is relatively advanced, with the nozzle will increase the mileage, fuel injection port is blocked or carbon impurities in the fuel.
growth over time, liquidity auto injector will be getting worse. Clogged nozzle will cause fuel injection is not smooth in addition to outside, can also cause problems such as increased fuel line pressure. And there will be reflected in the actual use of the following questions – still normal because the fuel pump oil, but could not get inside the cylinder with the fuel pump the same amount of oil, there will be trouble code after the ECU detected, triggering a decline in power problem.
In addition, want to solve the problem of nozzle clogging is also not that simple, especially for direct injection models for. Under normal circumstances, only replace the entire fuel injection system can cure. That is in addition to the four injectors, common rail also need to be replaced before they can together. In other words, this set operation down, is bound to spend a few thousand dollars of large material costs and labor costs.
Of course, another key component of a fuel supply system – in fact, also the fuel pump problems. But not so much a problem with the fuel pump, as it is the fuel filter problems. Especially given the probability domestic third and fourth tier cities oil, fuel filter problems will be significantly increased. Also, with theThe passage of time, gasoline impurities out of the gap will slowly clog fuel filters, so that the fuel can not flow at a predetermined flow rate, power is also reduced. Fortunately, if you replace the fuel filter to solve the problem.
In fact, those are minor problems described above, even if the nozzle is clogged by transducer element also achieve the effect of the drug to the disease , may cause a loss of power because if the engine cylinder wear, the cost to repair the first put aside did not say, can not repair all the same thing!
For the older engines, piston ring wear caused power attenuation is the culprit. When the piston ring wear, the clearance between the piston and the cylinder will gradually become larger. Therefore, when the engine compression work, these gaps allow the engine combustion air is enough to escape into the crankcase chamber, the compression ratio change occurs, the power will drop naturally, and coke, gas and other harmful substances will be polluted crankshaft oil tank.
In addition to an outer ring wear, cylinder wall in fact, because of the increased mileage will be worn, thereby increasing the clearance between the piston and the cylinder. And compared to the worn piston rings, the cylinder wear is almost non-maintenance, in addition to a small part of the cylinder liner with engine problems can be solved by replacing the cylinder, most of the rest of the engine can only be selected as a whole to be replaced. After the piston ring wear while you can let it return to youth through the “engine overhaul package.” Fortunately, durable piston cylinder wall a lot, if not intense driving more than 100,000 kilometers, the basic need to worry too much than that.
For older vehicles, after a certain mileage with the engine piston surface will leave some of the product more or less carbon, i.e. incomplete combustion of carbon-like particulates. While working with the engine, these charcoal-like particles is likely to participate in the work, and burn, but most still remain in the top of the piston.
In addition to these carbon look dirty, it will also cause hot spots within the engine, knocking formed. Although such a small range of not yet top knocking rod bending axis, butWhen the ECU will retard the ignition timing, thus affecting the power output of the engine.
Meanwhile, the carbon also makes exhaust valve side valve from closing properly, resulting in a gap. And such a gap the same problem also occurs in the blow-by gas of the engine work, thereby reducing engine power.
more than the old car engine problems led to a loss of power is the culprit, in fact, in addition to an engine cylinder block and piston ring gap, under normal circumstances it can be resolved through the normal power attenuation of maintenance and repair problem. But after all, the engine is a machine, it is bound to leave some time irreparable scars, so we remember to maintenance on time Oh!