When the car is unable to accelerate, it should be accompanied by shaking when the engine accelerates, shooting, black smoke, etc. There are many reasons for it. It is mainly reflected in oil, electricity and machinery.

一，油路故障。

1、 Oil circuit failure.

很多人認為節(jié)氣門積碳會影響發(fā)動機加速性能。但我認節(jié)氣門積碳只是影響怠速不穩(wěn)，對發(fā)動機加速性能影響不大。

Many people believe that carbon deposition on the throttle will affect the acceleration performance of the engine. But I think throttle carbon deposition only affects the unstable idle speed and has little impact on the acceleration performance of the engine.

空濾芯堵塞或進水會使空氣量小，導致混合氣過濃，發(fā)動機燃燒不完全，加速會不暢，此時，排氣管黑煙嚴重。

Clogged air filter element or water inflow will reduce the amount of air, resulting in excessive mixture, incomplete engine combustion and poor acceleration. At this time, the black smoke of exhaust pipe is serious.

油管裂紋或接頭松曠漏氣，油泵壓力不夠，導致供油不暢，影響加速無力。

The oil pipe is cracked or the joint is loose and leaking, and the oil pump pressure is not enough, resulting in poor oil supply and weak acceleration.

噴油器霧化不良或堵塞，導致缸工作不好或不工作。影響加速性能。排氣管可能冒黑煙。

Poor atomization or blockage of fuel injector, resulting in poor or inoperative cylinder operation. Affect acceleration performance. The exhaust pipe may emit black smoke.

油品問題也是一個方面。油如含水量過大，排氣管會排白色煙的。

The oil problem is also one aspect. If the oil contains too much water, the exhaust pipe will emit white smoke.

二，電路故障。

2、 The circuit is faulty.

空氣流量計有問題，引起的進氣量減少，導致混合氣過濃或過稀，影響加速性能。

There is a problem with the air flow meter, resulting in the reduction of air intake, resulting in too rich or too lean mixture, affecting the acceleration performance.

個別缸火花塞損壞，也就是說缺缸，影響加速性能。還有，缸線漏電等。

The spark plugs of individual cylinders are damaged, that is, the cylinder is missing, which affects the acceleration performance. Also, cylinder line leakage, etc.

水溫過高或溫度傳感器壞同樣影響加速性能。

High water temperature or bad temperature sensor also affect the acceleration performance.

三元催化裝置堵塞或氧傳感器有問題也會導致發(fā)動機加速不暢（很多人認為氧傳感器不影響發(fā)動機，只影響排放）。

Blockage of the three-way catalytic device or problems with the oxygen sensor will also lead to poor engine acceleration (many people think that the oxygen sensor does not affect the engine, but only the emission).

三，機械故障。

3、 Mechanical failure.

發(fā)動機氣門，缸套，活塞，環(huán)磨損后導致缸壓達不到要求。

The engine valve, cylinder liner, piston and ring are worn, resulting in the cylinder pressure not meeting the requirements.

進氣門間隙過大，排氣門間隙過小。或進排氣門呲了。會導致缺缸。影響加速性能。

The inlet valve clearance is too large and the exhaust valve clearance is too small. Or the intake and exhaust valves are exposed. It will cause cylinder shortage. Affect acceleration performance.

正時皮帶（鏈條）磨損，導致點火時間式遲或早同樣影響加速性能。

The timing belt (chain) is worn, resulting in late or early ignition time, which also affects the acceleration performance.

發(fā)動機缸墊呲了，也會導致此問題的發(fā)生。

The engine cylinder gasket is exposed, which will also lead to this problem.

缸內積碳過多。也是一種原因。

Excessive carbon deposit in cylinder. It's also a reason.

實際上，發(fā)動機加速不暢的原因很多。要根據(jù)車輛的各種情況來判斷。比如行駛公里，車輛年限，故障點等等原因來進行判斷。這是要有一定維修經(jīng)驗的。

In fact, there are many reasons for poor engine acceleration. Judge according to various conditions of the vehicle. Such as driving kilometers, vehicle years, fault points and other reasons. This requires some maintenance experience.

很多人說可以插電腦檢測。但要注意，象很多機械故障電腦是檢測不出來的。比如說氣門間隙大小，電腦是檢測不到的。當然，電路故障，電腦是很容易檢測的。

Many people say you can plug in a computer for testing. But it should be noted that computers can't detect many mechanical faults. For example, the size of valve clearance can not be detected by computer. Of course, the computer can easily detect circuit faults.

通過以上分析，可以看出，發(fā)動機加速不暢是有很多原因的。判斷這方面還是要有一定的經(jīng)驗。否則，會象狗咬刺猬無處下手的。

Through the above analysis, it can be seen that there are many reasons for poor engine acceleration. We should have some experience in this aspect. Otherwise, it will be like a dog biting a hedgehog.