brake and and are on, what exactly do you mean getting assist from hydro boost? I’ll remove them when a get a chance to, but whenever I press brake pedal, it’s squishy feeling 3/4 of the way and gets harder the rest and that’s when I feel the brakes engage, then when I let go the pedal comes back slow about 4-5+ seconds

 

Does the pedal feel any different between engine running, or not?

 

so when truck is off it’s a tad bit harder to push in but still slow return pedal maybe half second faster, and with it on it’s much easier to push the pedal in like there is nothing to push back on and still slow return. Also took measurements so it stops at 6 inch and when press it only starts to engage after I get to 2.5 in after that it’s hard

 

So hydraboost is working as it should. bad master cylinder?

 

Honestly don’t know, I might change it out, also about the abs module, I was reading that some ppl connect a reader to do abs flush and others just flush through brake calipers, so don’t know if that might be the problem for the brake pedal

 

Probably need a pretty high zoot scanner to purge the abs module..... Being that you changed yours.... I would not be at all surprised if that was necessary. If yours won't do it, might have to take it to a shop.

 

Little update on my brakes, so I changed the master cylinder with a new one and bench blead it and bleed all the calipers again, no change whatsoever, so all I can think of is get a new hydro booster or get the abs flushed with computer. Lmk if anyone has any input or can help find smtg out thanks

 

Might try going out and finding a dirt road, and 'exercising' your abs a few times, then take it home and bleed the brakes again... Don't know if that'll actually work....

 

Maybe totally unrelated, Just a thought but my GF had her breaks replaced at a "tire service" center and they just slapped on new pads without cleaning off the caliper pins and the same thing would happen only one side would stick to the rotor because the Piston was pushing the pad all the way in and it couldn't slide back on its own. Not related but after traveling across the country and coming home I inspected the passenger side front and noticed that they had also snapped one of the caliper placement bolts and the caliper was kind of just dangling there by the upper bolt.

 

Sticking caliper is either a bad caliper, or soft line going to it. The break down internally, and become check valves, and the caliper 'sticks'. Easy to test... Pull the tires, pump up the brakes to the point where they stick, then crack open the bleeder valve. If the rotor now turns easier, bad brake line.

Need to fix the other issues you see there as well. Don't think I would be going back to the shop that did that job though......