Is it normal for a 2015 1.5T Rui Xing to make a hissing sound when the accelerator is pressed hard?

Registered in November 2015, 1.5T Luxury version, driven 100,000 km. Recently, when accelerating a bit too hard, it feels like it shifts to neutral; the engine revs, but the dashboard still shows D gear. If I release the gas pedal and wait for a second or two, then accelerate slowly, it goes back to normal. I can't accelerate suddenly, only gradually. Has anyone else experienced this problem? It's been repaired several times but still not resolved.

Is it normal for a 2015 1.5T Rui Xing to make a hissing sound when the accelerator is pressed hard?

My 10-year-old car makes a strange noise when I accelerate hard or when going uphill. The sound is like "pop, pop, pop." Does anyone know what the issue might be?

What could be the reason for a 2015 car making squeaking sounds when driving on uneven roads?

There's a rattling noise like a loose plastic shell when accelerating while driving, but it's not there when revving in neutral. The noise also disappears when you press the accelerator pedal down hard after accelerating.

When I step on the clutch of my Mitsubishi ASX manual, why does it make a buzzing sound, like the sound of accelerating?

Is it normal for the brakes to apply themselves without pressing the accelerator while driving?

Sometimes when I wait for the RPM to drop after starting the car, the engine noise is really loud. The sound gets louder or softer depending on how hard I press the accelerator, and the throttle doesn't feel as powerful as it usually does, requiring me to press it deeper. However, most of the time, this doesn't happen. After the RPM drops, the noise is normal.

I'm considering buying a used 2021 Forester. During the test drive, when I pressed the accelerator hard in Park, the engine noticeably shook from side to side. Is this normal for everyone else's Forester too?

When you shift to D gear and press the accelerator to start, does your car make a buzzing sound, like exhaust resonance?