Without pressing the accelerator, the tachometer fluctuates up and down intermittently. When the RPM is high, the car shakes quite significantly. Is this normal?

Is it normal for a 2015 model 2.0L automatic transmission car to have the RPM around 1300 at 60-70 km/h, and when slowing down for a turn then accelerating again, the RPM suddenly rises and acceleration is slow, with the RPM at 1600 to 1700 at 60 km/h and not dropping, and sometimes after turning off the engine and restarting it behaves normally?

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

Is there any other Coaster owner experiencing the same issue where the engine RPM fluctuates up and down while coasting in neutral?

Why can't the Pajero burn out when the brake is fully pressed and the accelerator is fully pressed in D gear, with the RPM only reaching a bit over 2000?

Is it normal for a 2015 model to have a smooth start without accelerating, but require around 2000 RPM to start with acceleration, and then feel a noticeable jolt and tire slip?

When I start the car, the idle speed is around 2000 RPM, but after a while, it drops to 1500 RPM. It takes quite a long time to go down to around 1000 RPM. Does anyone know what's going on?

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

As a new driver, I've only driven the 2019 2.0 model, and I find the acceleration quite sluggish. When I press the gas pedal deeply, the engine needs to reach around 1800-2000 RPM to speed up a bit, and the engine noise is quite loud. Is this normal for a naturally aspirated engine with a CVT? I tried using the DS mode, which seems to provide what I consider normal acceleration, but I noticed the RPM goes up to four or five thousand. My friend's 1.5T Geely doesn't make much noise and feels more powerful.

Changan CS95 accelerates at 40-50 mph with high RPM but lacks power. What could be the issue?

Is it normal for the 2022 Kicks to shake when accelerating from a stop?