Random Spongy Brakes
I was wondering if you might have some experience with this. I have a 08 toyota yaris base model with no abs module. The brake pedal on these cars naturally feel spongy sometimes from what I was told from other yaris owners and some people have insisted on upgrading to braided stainless steel hoses. I really dont mind the original pedal feel as long as the car stops. Recently over the past few weeks, I noticed sometimes
the brakes feel more spongy than other times. I know its not the master cylinder since I've tried three different new ones, and then put my old one back on. The last one I had on was a new advics original toyota unit. I didnt bench bleed it before I put it on, but I bled it at the two front lines like I usually do. After a few weeks I started noticing the pedal would take longer to engage, so I put back the original one I had on the car, and same thing. I bled the lines individually, and I think it firmed up a bit more, and I found some air bleeding out the back. I found no leaks in the lines, calipers and wheel cylinders, and the front rotors have slight warpage, and still have about 40% pad material left. These days I dont really notice it as much. Should I be worried about it?