abs bleeding

[2008vueXE]

Wondering guys. And what type of system does it have? A delphi7? I'm wondering sincei have intermittent hard pedal leading me to believe I probably have air expanding inside with heat. I changed the master Cylinder about 8 months ago and I never had this issue until I did that swap. I did the typical RR RL FR FL procedure. Help. Is Not the booster hose or valve. I changed it. Not sticky calipers either. I did a full brake job since the pads were low all around and greased all the pins in which were in excellent shape.

[2008vueXE]

Is a 08 vue xe all abs disks.

[2008vueXE]

Here is another hint I noticed. Brakes dragged. I open the good and unplug the booster valve. I hear a healthy vacuum hiss, immediately the car rolls back. So when the vacuum gets removed the brakes let go. Hmmm. Either the booster is the problem or I might be close in my theory of air expanding. What do you guys think?

[2008vueXE]

Thxs for nothing. Lololololol. Since I'm the only player here. I'll update for those who are left with this dead brand. I replaced the rebuild MC and got another rebuilt that was bad out the box. Got a new one and wallaa! Good brake pressure. Car never braked like this before! Unfortunately. .. The new MC has such a good pressure within its Chambers that it made the brake drag 100000 times worse. When the drag came back, it slowly gripped it tighter and tighter. About 4 blocks down the road. .. tight and car go no more. I opened any bleeder and it squirts out and done, the car rolls. But this time I get a c0131 abs code. Pointing to the expensive pump or module. Reading around, looks like it's a gamble even trying to replace the module since it could also be the pump. So I gave it all, the car is worth less by the day sincegm dumped it. So I traded it for a new car. Done deal. Good bye. Good night.