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Your Car Stops Accelerating While Driving: Reasons

  • Car Talk
  • Xavier Sabastian
  • 7 minutes

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You’re strolling through traffic and having fun when your car stops accelerating suddenly. Don’t be worried; it might be a minor issue. Acceleration is a process that requires many parts and sensors working together to move your car forward. Problems with the vehicle’s acceleration may occur if this system fails. Read to know why your car stops accelerating while driving.

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You would expect your car to accelerate in proportion to how hard you pressed the gas pedal. If the vehicles are properly fueled and calibrated, they should take off as planned. If the vehicle cannot do this and hesitates or accelerates slowly, it may have a problem with its fuel or emissions system. And if your car has trouble accelerating, it should be repaired immediately to avoid unfortunate situations. Furthermore, trying to drive a car with engine issues can lead to more serious complaints later on. 

Why does the car start stopping acceleration while driving? 

There could be several reasons why your car is losing acceleration power- Air Delivery Problems, Fuel delivery problems, Ignition problems, Sensor problems, Mechanical issues, etc. 

 Clogged Fuel Filter (Both Gas and Diesel) 

Reduced engine power almost always results from a dirty or blocked fuel system. A fuel filter must filter the fuel entering the engine and combustion chamber. If the fuel filter becomes clogged, insufficient fuel will enter the combustion chamber, reducing the engine’s efficiency. You’ll feel like you’re losing speed even as you pick up speed. To begin troubleshooting this issue, examine the fuel filter. The fuel filter will either be in the engine compartment or the trunk, close to the gas tank. You may get the fuel filter changed by a professional for very little money if it becomes blocked. This is one of the most common reasons why your car stops accelerating while driving.

Clogged/Dirty Air Filter (Both Gas and Diesel) 

The engine requires clean air in order to function properly. The combustion chamber is vulnerable to damage from dust and other airborne particles. Therefore, the incoming air must always be pure. A pre-throttle air filter serves to accomplish this goal. This might be another reasons why your car stops accelerating while driving.

If the air filter is blocked, the engine won’t get enough air, altering the air/fuel ratio and slowing it down. 

When the throttle is opened, clean air is drawn in, and impurities are removed by a specialized air filter. Changing the air filter is recommended every time you receive an oil change because they deteriorate after a few thousand miles. 

Clogged Catalytic Converter or Particle Filter 

Toxic and unneeded byproducts of the combustion process are expelled via the exhaust. Combustion can resume in the engine sooner if the exhaust releases these gases from the system sooner. If the car can release gases at a higher rate than it produces, it will have optimal performance. However, your engine’s performance will suffer if there is any obstruction in the route, such as a blocked catalytic converter or exhaust.  

Faulty Throttle Position Sensor 

The throttle position switch (TPS) monitors the position and velocity of the throttle plate to keep the ideal air-to-fuel ratio. Engine speed is affected by bad TPS data, which in turn impairs acceleration. It will be if the experts are allowed to handle this problem. 

MAF Sensor Malfunction 

Sensor Malfunction is another reason why your car stops accelerating while driving. Mass Airflow (MAF) Sensors determine how much air pressure is applied to the engine during acceleration. When it receives that reading, it will relay it to the engine control unit (ECU), telling the throttle to open. You could lose a lot of power if the MAF malfunctions and inaccurately gauges airflow. Heat and dust can shorten the lifespan of sensors. It is recommended to clean them on a regular basis to maintain their efficiency. 

Oxygen Sensor Malfunction (Gas engines)  

 The mass airflow sensor (MAF) monitors airflow into the engine, while the oxygen sensor tracks exhaust gases. So, it makes sense to put it in the tailpipe. If the MAF and oxygen sensor data are consistent, your automobile is in great shape. 

  In addition to affecting the fuel injection system, the oxygen sensor is critical to your vehicle’s smooth operation. In the event of an O2 sensor failure, a lean situation in the engine will result, resulting in a loss of acceleration power. 

Faulty Fuel Injectors (Both Gas and Diesel) 

The combustion chamber receives fuel from the fuel injectors. It’s done by spraying in fuel at high pressure. The fuel must be sprayed into the chamber at the right rate for combustion to occur.  Even a small error can throw the combustion cycle off, leading to lost power and damaged cams or pistons in the worst case. 

Fuel Pump (Gas Engines) 

The fuel tank and the fuel pump are connected. It transfers fuel to the engine. The fuel pump must be solid to transfer fuel at high pressure. If the fuel pressure is too low, the injectors won’t be able to spray enough gasoline into the engine’s combustion chamber, and performance will suffer. 

A faulty fuel pump will not pose problems at low speeds, but you might be left wanting when looking for quick acceleration. Since gasoline pumps often last a long time, inspecting the fuel pump on your car might not be your first move. 

Poor Cylinder Compression (Both Petrol and Diesel) 

In order to confine the explosions occurring within them, the cylinders in an engine must be hermetically sealed. This fundamental operation is at the heart of the automobile. When the compression rate is very high, all the explosive energy is used to power the pistons. But if there’s a leak, the compression rate will go down. If the cylinder cannot contain the explosion, not all of the force is being sent to the wheels. This can cause a loss of acceleration power. 

Worn Spark Plugs (Gas Engines) 

Problems with the engine’s power can be traced back to the spark plugs. They produce explosions within the combustion chamber utilizing a spark. Your vehicle won’t start without them. It is possible that faulty spark plugs are to blame for your power loss in extremely unusual circumstances. Misfiring is the most common sign of worn spark plugs. If your car’s engine isn’t making the sound it normally does, it could be because a spark plug is worn out, and you’re using less fuel and less power than usual because of it. 

Faulty Turbocharger / Boost pipe leak  (Both Petrol and Diesel) 

Most likely, the turbocharger cannot raise the turbo pressure because a turbo boost pipe became dislodged. If you do this, the engine’s performance may drastically decrease, and the turbocharger may even fail. 

via Giphy

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