Hey guys, looking for some brake advice. I have an 03 x type

>>16277133
Are the calipers installed on their correct sides, with the bleeder screws on top?

If so then it's still got a lot of air somewhere. ABS brake systems give a lot of hassle with bleeding unless a pressure bleeder and a scan tool that can exercise the ABS solenoids are used.

>>16277334
I've bled like a mother fucker with nothing coming out and no pressure building in the pedal. I actually found several other people having the booster go bad after just doing brakes with no explanation as to why it happened. I've already pulled the booster and am about to go get another. Hoping for the best

>>16277816
Also the hissing was from around the booster like a leak in the diaphragm.

May need to bleed the abs unit via a scan tool.

Having a failed booster would result in a really hard pedal, not a low pedal.

>>16277830
That was my initial thought, and there are no idle issues when it's depressed either, but the booster sounds like a damn blow off valve when the pedal is pressed, and then it drops the rest of the way.

Are you sure you installed the correct master? Did it look identical to the old one? Was there any pin or adjustment rod that may need tweaking?

If everything seems correct, take it to a shop and have them try to do an abs bleed.

The master was identical. I'll see about getting the abs module bled.

>>16277970
I actually replaced the master after doing the calipers when it started. It felt like the cup seals were blown out, and after replacing it felt the same. A friend of mine suggested it being the booster having a leak and after seeing boosters having gone bad from just doing brakes I went with that.

File: 1460603435963.png (157KB, 500x375px) Image search: [Google]

157KB, 500x375px

I've had issues with GM vehicles where its impossible to manually bleed all of the air out of the ABS unit once you replace a caliper.

Bleed it for 2 quarts worth of fluid PROPERLY and it still feels spongey when you have vacuum assist.

pic unrelated

File: 3429999qt68fic9th.gif (366KB, 370x200px) Image search: [Google]

366KB, 370x200px

Put everything back together this eveing. Went to bleed the abs module, seemingly no air. There is a sneezing sound coming from the booster, but it goes to the floor. I'm pretty fuckin clueless rn.