Why is the speed high after cleaning the throttle and injector?

The function of the fuel injector is to accurately deliver fuel to the engine for combustion. Automobile fuel injector is a simple solenoid valve. When the electromagnetic coil is energized, the suction force is generated, the needle valve is sucked up, the nozzle hole is opened, and the fuel is ejected at a high speed through the annular gap between the shaft pin at the head of the needle valve and the nozzle hole, forming a mist, which is beneficial to full combustion.

Fuel injector failure will lead to increased carbon deposition, unstable idle speed, increased fuel consumption, weak acceleration, difficult start-up, excessive emissions and so on. If it is serious, the fuel injector will be blocked and the engine will be damaged.

Reasons for high fuel consumption:

1, poor ignition: the spark plug gap is too large and the ignition coil energy is not enough;

2. Poor atomization of the fuel injector: the fuel pressure regulator is faulty and the fuel pressure is too high;

3. Too much carbon deposit in the engine: part of the sprayed gasoline is absorbed by carbon deposit;

4. Sensor failure: For example, if the water temperature sensor fails, the engine will be mistaken for a cold state, and fuel injection signals will be sent all the time, resulting in high fuel consumption;

5. Oxygen sensor failure: it will make the fuel correction invalid, and the computer will always send out the signal of fuel injection. Failure of air flow meter will lead to incorrect intake data.

Pay attention to the following points when encountering nozzle blockage;

First, don't coax the throttle, especially if the nozzle is blocked. After your big foot, the nozzle will be completely damaged.

Second, the fault light is turned on after a long period of poor combustion, and it will be reported after a certain number of times, indicating that the car did not burn well before, which may be that the oil or oil circuit deteriorated and there was no good fuel to burn.

Thirdly, if the oil circuit is not cleaned and improved, cleaning the throttle will lead to an increase in air intake, thinning of the mixer, vehicle idling jitter and throttle jumping.

Fourth, repairing a car doesn't mean it's okay. Repairs may aggravate problems elsewhere. This is normal and requires the use of exclusion.

Fifth, in the case of poor combustion, jitter and channeling, clean the oil circuit first, and don't replace the accessories in a hurry.

This is easy to handle. When such a fault code is encountered, it is confirmed by testing that the fuel nozzle is blocked. So the traditional method is to remove the nozzle and replace it. Let's start with the reason. We must first find out why we are blocked, so as to avoid being blocked in the future. After all, the replacement cost is very high. Will it be expensive to plug it in after replacement?

There are two kinds of blockage, one is the external blockage caused by dust and carbon accumulation outside the nozzle in the combustion chamber, and the other is the internal blockage caused by oil in the oil circuit. Both of these blockages can be cleaned and dredged by PNF additives. But you must use effective additives. Don't wait for something to go wrong before thinking about changing parts. It is too expensive to solve the problem.