Brake issue, maybe

Okay, TW friends, I think i may be having a brake problem.
What I did -
Recently replaced front calipers and lines and also replaced my rear brake too. did the bleed as the FSM stated and even did the BPV.

The Problem -
When traveling on the grass (thanks REDZ for the use of your lawn) about 10 to 15MPH if I slam the brakes on ABS works and all is good. When on pavement, no ABS, even at round 40ish and I'm standing on the brake.

When I go for the brake quickly, I hear what sounds like air pissing from the brake booster. (noise heard inside the cab) I checked the booster as per the FSM and all seems good (air tight). Could it be the Mater Cylinder? Does anyone else’s braking system make this noise I describe above, or is this normal and may still have air the system somewhere? It’s starting to drive my crazy, so any help would be appreciated!

Thanks in advance.
JVTacoma
2003 Xtra Cab 3.4L TRD 4WD

 

Bump.....HELP!

 

I'm really not sure if it made the noise before i did the brake job or not. All i know is that now it does. If you go for the brake ped. quickly in your rig does it make a noise. After reading more on other posts, it sounding more and more as if it is the MC

 

is the master cylinder leaking even in the least? if not....its possible you have a small leak in the line for the brake booster.

 

Get that shit fixed. We bleed that shit 4 times, I dont think its Air. Unless its trapped in the MS. Maybe just take it somewhere....?

 

Mine makes that sound too when im offroading , same with my buddies truck which is the same as mine just a 08. its not an air leek its the abs unit engaging.

 

but the problem is when on the Highway, the ABS does not work. He can stand on the brake pedal and doesn't even lock them up.

 

not tryin to be a smartass, but thats kinda how abs is supposed to work.............it isnt supposed to lock them up.

 

yes but the system is NOT working. ABS does not engage..... and when you hit the pedal hard you hear a Psssssssssst.

 

you may have air in your lines, bleed em

 

ahhh.......i see. damn man. not too sure then....unless a vacuum line is fubarred...but that would only be on a truck with vsc. maybe he still has air in the system that needs to be burped out. bout all i can think of right now.