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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22 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.

    Reply
    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.

      Reply
  2. My MercedesBenz c220 cdi 2010 when reaching a speed of 130 the orange light comes up and it looses power diesel pump inside the tank have been replaced but it is still doing the same

    Reply
  3. My petrol car loses its power when i accelerate..i changed the filter,lead set oil pump…but the problem still exists..what will b the cause?help me out..!diagnose..

    Reply
  4. my 2005 ford five hundred has a acceleration problem and just happens when am driving of course but just when I want to or need to accelerate it tends to kinda shake or some kinda a big vibration and stops as soon as release the gas pedal..?

    Reply
  5. My new Holland wheel loader have high acceleration and sometimes it can accelerate itself without stepping on the pedal. Also there low steering pressure warning on its dash board. What might be the problem?

    Reply
  6. Timothy Lockhart · Edit

    Hi my name is Timothy and I’m have trouble with my 2002 nissan Altima 3.5 I can be riding down the road and it lose power I change the throttle body sensor I change the two cam sensors but it still doing the exact same thing like I said I could be going down the road and I lose power but like if I pull my my window like I’m letting my windows up and I hold it it’ll catch up catchpower what’s going on with it and it’s like I have no separation but it’ll catch and then I lose again and a kickstand I lose again help me please

    Reply
  7. hello! my names are Alfred John.
    Currently i replaced a new dry cell battery(Toyota Passo) but my car still faces the problem of near-shutting down.

    What might be the problem?!

    Reply
  8. Thank you for your very helpfull advise. I drive a 08 vauxhall corsa. While i was driving i was loosing power i hope its only the filter that needs changing as i also had some white smoke coming from the tail end of my car. But when it had rested for a few hours it started up fine. I am going to get it checked out so fingers crossed

    Reply
  9. hi my Toyota Innova was just oiled change and and service cleaned last April 2018. Lately, it is having difficulty accelerating. Would you know the reason why?

    Reply
  10. Hola, comento un caso particular en que me falló una boina de corriente, eso también hace que caiga la aceleración del vehiculo, aunque no solo eso, por supuesto afecta toda la parte electrica,

    Reply
  11. My car ford focus 2013 model sedan type experiencing the following: Most of the time when i started to run the car, i felt that rpm doesn’t increase even i stepped on the accelerator with pressure, then after few moment, as the automatic gear shifted, rpm decreases in a sudden, which is supposedly smooth. And it happened every time the gear shifted. However, during the high gear and on stable running, everything is well. But then, when using engine brakes, i felt that something is jerking or shaking especially when shifting to low gear along with the engine brake.

    Last week transmission has been changed with a 2nd hand one, catalytic converter and TCM were brand new changed as well.

    What is the problem?

    Reply
  12. My Golf 6 1.4 TSI 2012 model is loosing power and cut off ,when I press accelerator the is no compression on it. The other thing I have noticed is that the car it’s like changing it self when it’s about to start this cutting off. I normally park the car aside and wait for 20 to 30 min before it can start again. When I open the bonnet the engine is so hot especially the turbo side. I have taken my car to the Vw dealers and mechanics non of them seems to be able to solve this issue please assist me. I am in South Africa

    Reply
    1. look like your car overheat, please check engine oil on dipstick to find out the oil and coolant mix. and check the compression each cylinder

      Reply
  13. Hi I just had camshaft sensor replaced in my santa fee. Collected it from garage and its loosing power. Can you explain why this is. Very worried

    Reply

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