9 Top Reasons Why Car Jerks When Accelerating

9 Top Reasons Why Car Jerks When Accelerating

August 28, 2021 0 By admin

Car jerks when accelerating in first gear appear in the most familiar jerking types list that happen to beginner drivers. Yet, experienced drivers could face this issue after driving a car over a long period. So, what are the causes of jerking? How to avoid it, then? 

If that’s what concerns you, read this article to gasp more about car jerks when accelerating and ways to fix it now!

Clogged Fuel Injectors 

The fuel injector sprays petrol pump fuel to the cylinder combustion by a special nozzle. When this fuel injector is dirty and clogged, the engine won’t receive enough fuel. Subsequently, it makes your car lose power and continual speed leading to jerking.

Well, how can we keep the fuel injector away from being stuck? The solution is quite simple; you need to clean this fuel injector frequently or even replace it! Taking apart and reinstalling a fuel injection is not difficult, which means you can easily do it yourself.  

Car fuel injector
Car fuel injector

Deficient Fuel Pump 

Similar to a fuel injector, the pump plays a primary role in the fuel-providing task to the whole engine. If the volume of fuel isn’t regulated suitably, your car will shake while you accelerate it.

Although keeping the fuel pump away from downgrading is a good idea, you can choose a good fuel to reduce clogging at the lowest rate instead. Moreover, the replacement of this part won’t cost you much! 

Poor Catalytic Converter 

It is inevitable to see vehicles moving on the streets and puffing black smoke out behind. 

In detail, the most likely reason for this problem might be related to the blocked catalytic converter. The catalytic converter helps clean your car’s exhausts before going through to gas exhaust pipes. Hence, a blockage will happen with a huge air/fuel mixture and prevent the airflow exhaust systems. This is also why the smoke color changes to black.

You can temporarily use chemical engine cleaners or even change a new catalytic converter to avoid this trouble. 

Car Catalytic Converter
Car Catalytic Converter

Damaged Air Filter 

Why do car jerks when I accelerate? The answer to this question could be due to the age and dirtiness of your air filter.  As the air filter allows pure air to flow through your car engine, it plays as a first protector to keep your engine away from contaminants such as dirt, broken pieces, and other road objects. 

Therefore, you must regularly clean your air filter and check its status to get rid of the mentioned situation. Believe it or not, you can prolong your engine life and decrease juddering issues with this habit! 

Faulty Mass Airflow Sensor

Faulty mass airflow sensors are another reason your car jerks when accelerating at high speeds. To be more specific, this means that your vehicle needs additional air to enter the engine control units during speeding up! If the mass airflow sensor works poorly, it would disrupt the combustion process, making your car unable to run properly.

Please also be aware that it is really dangerous while driving on the freeway. Thus, taking your beloved car to the repaired garage is the best way to avoid unfortunate incidents!

Mass Airflow Sensor
Mass Airflow Sensor

Defective Spark Plugs

After the air and fuel compound flows to the engine, the spark plugs are responsible for burning it up and bringing it to every piston cylinder. If they are stagnated with diesel, oil, and carbon, this can result in car jerks when accelerating from stop.

It usually occurs when drivers shift from neutral to another gear to speed up from a stop. At the same time, the fouled spark plugs cannot ignite and catch up with the change.

So, we advise you to replace these engine parts once you detect a sign of this error!

Build-up Moisture

Similar to the above causes, car jerks when accelerating at low speeds mainly occur when you leave your car parked outside overnight. In particular, moisture can easily form on your car’s distributor cap, especially in cold and wet weather. The problem will quickly disappear after the water dries out. 

You only need to bring your vehicle to the garage or other dry spots to solve this issue. If else, you can use a thermal cover instead. 

Break Linking Of Throttle Cable

The next factor on the list is the state of the throttle cable. Although most modern cars have the wire electronic accelerator cable, some cars maintain their physical throttle cable. It looks like a bridge between the starter plate and the gas pedal, which controls the towing power of cars. 

After long-time usage, this linking cable becomes weaker and worn out gradually. At that time, the pedal and throttle plate cannot work to their full capacity. Your car will face car jerks when accelerating at high speed and slow acceleration symptoms as a result. 

The only way to get away from this problem is to check it routinely and replace the cable immediately once you spot out that something went wrong with it. 

Bad Transmission

Here are some jerk types during accelerating causing by the fault of transmission:

  • Car jerks when accelerating uphill: makes your car delay downshifting when stepping on the gas pedal after stopping in the middle of slopes.
  • Car jerks when accelerating automatic: this happens in automatic transmission cars mainly because of the solenoid.
  • Car jerks when accelerating in reverse: combined with a grinding noise, indicate a gear fault in the transmission. 

Compared to some engine faults, this mechanical problem is quite hard to fix by yourself. Therefore, we recommend you leave your car at a pro automotive repair center to let them help you! 

Bottom Lines

Regardless of the reasons, maintaining your car properly and regularly is also the ultimate solution to avoid the issue from occurring! Don’t make your car become a whole lot of scrap iron! We hope that you’ve gained insights on the causes and solutions when your car jerks when accelerating.