Help with Brakes 07 spec v

[Rileyml1]

I have a 2007 Nissan Sentra SER Spec-V. (First thing be for reading this please note that there is a recall for the master cylinder that has already been replace by Nissan dealer.)I am having a very big brake problem that I can't seem to fix and is getting worse. My brake pedal is VERY TOUCHY. Every time I go to put on the brakes its harder pedal. The car has had the Dot 3 brake fluid flushed twice and all brake lines bleed. (This has been done with a brake line pump. This has been done 100% the way Nissan dealerships bleeds brakes) I have replace my rotors with Centric power slot cryo rotors. My old rotors were warped from a 75-0 stop as hard as the car let me. There was a pile up on the interstate that I did not want to become part of. But the problem did not happen then. This problem happened when I was just driving down the road on a warm winter day and went to put the brakes on. What happened was I went to slow down around a turn that has a red light, the first time I applied the brakes everything was fine.(the brake pedal was nice a plush with like any one car I drove) When I went to apply them again to make the final stop the brakes became Very hard. Ever since that day I have been having problems braking. I had the brake system flushed, new rotors and pads, tested the vacuum on the brake booster. Everything checks out on that end so now I am stuck. I have checked all simple things that I know off still can't find the problem. Can anyone Please help me. Nissan says it is OK but I know it is not I put 40K miles on the car and I know what the brakes should feel like.

Also note here is PA we have had lot of rain the past 2 days. For some reason not sure my brakes started to hum when I applied them on my way to work. Now last night I had to work a overnight so I had little time on my hands. So I went on a little drive took the car to about 80 mph and did a good stop (not a full stop just a slow roll so no pad in-print would happen) When I did this there was Smoke pouring from the brakes and now I have a blue almost warped looking color on both my rotors. Now when I was driving back to work I noticed that there was no hum but still stiff pedal. Also now I'm scared I really did damage to my new pads and rotors. On my ways home i took the highway and could not tell that the rotors were warped. So that is a good thing but not sure why the rotors turned that color I did harder stops from people pulling out in front of me or coming off the highway. Any idea?

Thanks Riley


Modified by Rileyml1 at 4:03 AM 3/29/2010