Sound and smell

Mrb friends, from my 2004 model 1.6 XR petrol-lpg vehicle;

1) For the last few days, there has been a smell that resembles the smell of burning on long roads, and when I open the vehicle's hood, it looks like a smell of gasoline,

2) When I go with my car, when I pass a place like a light bump, there is a sound called cuk,

3) If there are too many people in the back of my car, there is a sound like these when people get off,

4) In the sound like whistle inside the vehicle,

Why might these problems be caused? Thanks in advance for your help :))

NOTE: The vehicle's pads, belts etc. have changed.

What you wrote in 3 and 4 is also in me. I could not find it yet. I will take the car to the service why it is caused.

I'm looking forward to

I would be glad if you write the solutions.

[QUOTE = nteker] Mrb friends, from my 2004 model 1.6 XR petrol-lpg vehicle;

1) For the last few days, there has been a smell that resembles the smell of burning on long roads, and when I open the vehicle's hood, it looks like a smell of gasoline,

2) cuke slight bump as it passes from one place to go with my car she comes from a sound, shock absorbers or make the space that holds the tire swing

3) If there are too many people in the back of my car, there is a sound that sounds like these people get off, torsion or shock absorber

4) In the sound like whistle inside the vehicle,

I don't know, Oğuzhan, we will wait for the help of experienced friends.