What are the symptoms of dirty throttle?

It is necessary for a friend who drives a car to master certain troubleshooting methods, because sometimes we can't just look for a repair shop or a 4S shop when the car breaks down, and we need to check it ourselves. So what is the performance of dirty throttle in car failure? Let's have a look.

What's the performance of dirty throttle?

Function of throttle valve

According to the load of the engine, the air intake is controlled.

Generally speaking, the fuel injection quantity of an engine is based on the air intake, and the more air intake, the more fuel injection. The throttle valve controls air intake and indirectly controls fuel injection. We usually step on the accelerator to control the opening angle of the accelerator.

Symptoms of dirty throttle

Throttle is a controllable valve, which is used to control air to enter the engine. Throttle is one of the most important components in the engine system. Its upper part is an air filter and its lower part is an engine cylinder, which belongs to an automobile engine. Throat? Therefore, when the throttle is dirty, the engine will fail. The performance symptoms of the engine throttle are:

1, when the car refuels, it will feel that the accelerator is stuck heavily, the speed will be slow, the speed of idling on the accelerator will rise slowly and the response will be slow. Release the accelerator when driving, and the speed will drop immediately.

2. The unclean throttle will affect the accuracy and smoothness of engine intake. One of the most obvious problems is that idling may cause jitter or even flameout, and the throttle speed is not smooth.

What are the reasons for dirty throttle?

1, mainly the interior environment, the air intake screen is not well filtered, and the surrounding environment is dusty.

2, the variety of engine oil is not good, and the evaporation is large.

It is produced by oil, gas and impurities in the crankcase.

4, after the flameout, the throttle can't be very tight, inhale some dust, many a mickle makes a mickle.

How to judge whether the throttle valve is dirty enough to need cleaning?

1, the most obvious feature of dirty throttle is unstable acceleration. These problems can be directly felt by the owners themselves.

2. There is also a simple trick to judge whether the throttle needs cleaning. If the engine of the EFI car is not loaded, it will slam on the accelerator for 3000 rpm in the neutral position, and then suddenly close the oil. Pay attention to the tachometer pointer at this time. (Note: This is applicable to almost all EFI vehicles. Especially for electronic throttle vehicles, it is easy to judge the throttle number of cables, and it tends to point 2. )

(1), when the pointer quickly drops to 1000 to 1200 rpm, the pointer will pause a little and then drop to 800 rpm. The throttle is completely normal at this time.

(2) When the pointer quickly drops to 800 rpm, the stable throttle is basically normal, but it still needs cleaning.

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