When you find out about abnormal noises on your Ford Focus you tend to concerns about them. Especially when you feel a noise when you accelerate on your Ford Focus. It is automatically assimilated to an engine problem and can therefore be considerable. As we know that you do not take these trouble lightly, we have decided to publish this document to support you find the causes and get rid of this matter as quickly as possible. To do this, we will first see what are the reasons of a high pitched noise when accelerating with my Ford Focus, then what is a whistling or ratling noise at the acceleration of my Ford Focus, then the sources of a noise that intensifies during acceleration and finally a noise that stops when I stop accelerating.noise-when-acceleratingford-focus

Ma Ford Focus makes a high-pitched noise when I accelerate:

If your Ford Focus produces a loud noise when you accelerate, it is quite possible that the alternator belt is the cause of your problem. You will need to define if this noise appears suddenly and if it can stop as it started. The alternator belt is a wearing part that is employed to bring power to the secondary components of your Ford Focus’s engine and although it is less vital than the timing belt it can bring about engine failure if it breaks. This noise may be a warning sign of a slackened belt, in which case the tensioner roller or its wear and tear may be at fault. In any case, verify the condition of your belt and its tension. If it causes this acceleration noise on Ford Focus, go to your technician.

Ma Ford Focus makes whining noise when I accelerate:

  • Rattling or whistling noise generated by the turbo
  • If you have a power loss that comes with the rattling noise when you accelerate with your Ford Focus, it is plausible that your turbo is declining and some of its parts are at the end of their life. Check it and swap it if it is the cause, otherwise you risk clogging your engine in the long run. If you perceive this blowing or whistling noise on your car, feel free to read this content about turbo noises on Ford Focus, if you would like more details.

  • Humming noise caused by air leakage
  • If, on the other hand, you do not get any power loss due to an humming noise on your Ford Focus, it is more than likely that you have one of your junctions or air hoses that has holes. So verify the whole air supply system from your air filter to your engine to locate the origin of this acceleration sound.

Ma Ford Focus produces an increasingly loud noise when I accelerate:

If, on the other hand, you have the feeling that the more you gain speed, the more your noise at acceleration on Ford Focus gets loud, then you will have to think about the rolling parts of your vehicle. Indeed, if this loud noise does not surface when you iddle, it is necessarily in connection with your transmission, and, in general, to your wheels. The most regular cause is the state of your bearings, so remember to verify their state to ensure that it is not the cause of this loud noise when you accelerate. If not, go to this article about the noises related to Ford Focus noise wheels.

Ma Ford Focus produces a noise when I accelerate that stops when I stop accelerating:

Finally, if you encounter a noise when accelerating with your Ford Focus and this noise which could be a cliking sound tends to end when you disengage (press the clutch pedal), then one of the wear parts of your clutch system may be the cause. Indeed, the clutch release bearings must be replaced around every 120 000 / 130 000km. To test it, you just have to see if you have more difficulty than every time shifting gears, if you feel a resistance either stronger or non-existent in the clutch pedal. If you have any of these signs of illness, go to your mechanic to replace the clutch release bearings on your Ford Focus. Look at our article on clutch noise on Ford Focus for more information.