A loose belt is the most likely culprit, when you press on the gas all of a sudden the engine will respond quickly but a belt driven component like the alternator will give resistance thus causing the squeal.
A bad throw out bearing will make noise when the clutch pedal is pushed down.
Squealing noises when pressing the brake pedal on a Nissan Quest can be caused by several factors, including worn brake pads that have a built-in wear indicator, which emits a squeal as a warning. Dust, debris, or moisture on the brake components can also lead to noise. Additionally, insufficient lubrication on the brake parts or improperly installed brake pads can contribute to squealing. Regular maintenance and inspection can help address these issues.
A squealing sound when letting off the gas pedal can be caused by several issues, including worn or loose serpentine belts that may slip under load. It could also indicate problems with the brakes, such as worn brake pads that are making contact with the rotor. Additionally, issues with the engine's accessories, like a failing alternator or power steering pump, could contribute to the noise. Identifying the source typically requires a thorough inspection of the vehicle's components.
Start by checking the fuel pressure.
Does the noise happen all the time you push on the gas pedal or only at certain speeds?
Breaks will often squeak when they are wet, such as after a heavy rain, on a humid day, or on a foggy morning. The water prevents the pads from properly grabbing the rotors. This causes the squealing noise.
A vibrating brake pedal is an indication of a warped rotor. Noise is common to disk brakes but depending on the noise it can mean that the brake pads are worn out and you are due for a brake job.
When the turbo winds up it can make a whistling sound when a driver steps on the pedal. A loose part can also cause a rattling sound when the pedal is used.
could be the throw out bearing
It will be noisy, squeaking or squealing coming from the trans, and you may feel roughness or vibration through the clutch pedal when holding it in, it may also give you a little extra resistance when pushed.
Your bike may make noise when you pedal due to issues such as loose components, misaligned parts, or worn-out bearings. These problems can cause friction and vibrations, resulting in the noise you hear while pedaling. Regular maintenance and proper adjustments can help reduce or eliminate these noises.
The pedal in the car you push to go faster is the accelerator pedal.