11 Causes of Car Losing Power When Accelerating (Diesel & Petrol Engine)

4. Clogged Exhaust Pipe (Diesel & Petrol Engine)

There are two filters in an exhaust pipe; the muffler and the catalyst converter. The job of the catalyst converter is to cut down the amount of pollution generated from the exhaust gasses. As for the muffler, its job is simply to decrease the amount of noise that is made. If the exhaust pipe or any of its filters were to get clogged, it would weaken the functionality of the engine by reducing its power and making the vehicle drive slow when trying to accelerate.

5. Camshaft Position Sensor Malfunction (Diesel & Petrol Engine)

The vehicle’s camshaft position sensor is responsible for gathering information about the camshaft speed of the vehicle and then sending it to the electronic control module. This module is a computer which exists inside most new cars that are made nowadays. Once information about the camshaft speed is sent to the ECM, the computer will then manage the timing of both the fuel injection and ignition based on this information. However, if there is a malfunction with the camshaft position sensor and it’s not able to send this information to the ECM, then the performance of the engine will be greatly impacted and likely won’t be able to function properly.

6. MAF Sensor Malfunction (Petrol Engine)

The main responsibility of the Mass Airflow Sensors is to measure the amount of air that flows into the engine and then report this amount to the Powertrain Control Module. From there, the module will use this information to calculate the load that is being placed on the engine. If there were to be some sort of malfunction with the sensors, then the engine’s performance would be diminished.

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2 thoughts on “11 Causes of Car Losing Power When Accelerating (Diesel & Petrol Engine)

  1. Hello, my stepvan with a diesel MWM international engine is failing when you hit the gas pedal. What could be the cause?
    The truck was sitting at a storage for 3 or 4 months.

    1. It can be learning value memory in your engine ecu is deleted due to no power source. Just make initialization, start engine warm up than drive vehicle for more than 30 minutes.


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