Why Is Your Car Getting More Sluggish? It's Not That The Engine Is Old, It's That The Fuel Injectors Need Cleaning.

The same car, when new, just presses the accelerator, but after five years, it feels like pressing cotton, and the power never comes. Most people's first reaction is that the engine is old and in need of a major overhaul. But an experienced mechanic who has actually been to the garage will tell you that it may not be the engine, but your fuel injectors that needs cleaning.
So where does this languor come from?
First, let's take a look at how electricity is generated. Whenever an engine makes a power stroke, it relies on a precise mixture of fuel and air and ignition. This ratio is known as the air-fire ratio and the optimal value is 14.7:1. The injector's job atomizing the fuel into micron-sized droplets in milliseconds, which are then sprayed evenly into the cylinder.
The new car's the injectors are in good condition, nebulize well, burn cleanly with every drop of fuel and have plenty of power. After driving 30,000-50,000 km, due to repeated friction, the gap between the injector needle valve and valve seat increases, leading to fuel injection deviation, poor atomization, larger droplets, thicker, incomplete combustion. Naturally, momentum slows.
This is not because the engine is old, but because the "mouth" of the "feed" engine is faulty.
How dirty is the injectors?
Shocking footage has emerged of the moment an injector was removed and left uncleaned. A normal injector nozzle is a finelymachined circular micropore with a diameter of less than 0.2 mm. But after tens of thousands of kilometers, black carbon deposits appear at the edges of the nozzle, orifice diameter shrinks by athird or even half, the cross-section of the fuel flow decreases, and fuel injection volume drops directly.
Worse was the tight cover of the needle valve. In new cars, the needle valve matches valve seat perfectly, and there is no fuel leakage when it is closed. But once carbon is deposited on the seal, the needle valve cannot be closed and fuel drips into the cylinder as the engine shuts down. The next day, during a cold start, the extra fuel made the mixture of air andfuel too rich, causing ignition difficulties, idling vibrations and a two-second delay before the accelerator reacts-the direct reason you felt the engine slow.
Three signs fuel injectors need cleaning:
First sign: an inexplicable increase in fuel consumption. With an increase of 1-2 litres per 100km, the range offered by a full tank is significantly reduced. Poor injector atomization is not effective, will reduce fuel combustion efficiency, the same power output requires more fuel, resulting in waste.
Second sign: Idling vibrations. steering wheel and seats vibrate noticeably when the engine starts cold, improving slightly after warming up, but still not as smooth as in the new car. This is because the fuel injection volume of different cylinders is inconsistent, some cylinders injection more, some cylinders injection less, resulting in uneven power output, engine vibration.
Third sign: Delayed acceleration. Power is not generated immediately after you press the accelerator, and there is a delay of between half asecond and a second before the throttle starts. This is because the injector response is slow to respond; after the ECU gives the command, the injector cannot execute it accurately and immediately, and the fuel supply cannot keep up with the change in throttle opening.
If two or more of these three points apply, the problem is almost certainly the syringe.
How to clean it? How many times?
Currently, there are two main cleaning methods. One is a non-removable cleaning, in which a special cleaning agent is added to the fuel tank while the engine is running. Cleaners flow through the injectors along with the fuel, dissolving carbon deposits before being expelled. The advantage is that it is cheap and easy to use, but the disadvantage is that it is only effective for large amounts of carbon buildup. The other is ultrasonic disassembly cleaning, oil injectors are removed and placed in an ultrasonic cleaner using a special solvent for deep cleaning. This method is the most thorough, but the labor costs are high.
Non-removable cleaning is recommended every 20,000 to 30,000 kilometres and deep cleaning every 60,000 kilometres. Fuel filters need to be replaced every 20,000 to 40,000 kilometres, which is the first line of defence for the injectors. If the filters are clogged, dirt can stick directly to the injectors.
Finally, here's a piece of advice: Don't wait until fuel consumption soars and engine vibration badly before you consider cleaning. Damage to the injector is cumulative. Once the carbon buildup hardens and clogs the nozzle, cleaning won't fix it; replacement is the only option. An injector can cost hundreds of dollars, but when it wears off, it can cost thousands to replace the entire assembly.