2. Did you just change the brake pads, disc brakes or drum brakes? In the case of disc brakes, the gap between the brake pad and the brake disc is very small. It will feel hard at one o'clock. Hardness has little to do with it, but the braking effect must be good. If it is not good, the brake pads are too hard. Just change the soft brake pads. If the braking effect is good, you can let some air into the oil circuit, so that your feet will feel better. The method is as follows: relax the exhaust port, step on the brake pedal and step on the position you want, so that the brake oil is discharged, release the brake pedal, let the exhaust port suck in air and lock the exhaust port, and it is finished.
You said that the car's brake idle speed would be high. Is there anything between the brake pedal and the accelerator? Do you know what the angry voice under your feet is like? I drive many kinds of cars with gas brakes. As soon as I got off the stage, there was the sound of air staying. I don't know if your voice is different or if you don't usually notice it.