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....