how do you know when you have to change the brake pads? and i have been hearing a loud hissing sound coming from teh front of my car, its a on and off thing, i have no idea why its doing that, when i totally stop, the sound goes away, could that be related to my brake pads?

the sound can also be described as air leaking, but i checked my tires, and they arent so i have no idea

 

places like les schwab do brake checks for free..... take it to them

 

maybe you have turbo?!!!

 

its probably your pads wearing down to the metal