I recently purchased this vehicle as a work truck. When I bought it I had to pump the brakes one and half times for them to work properly. The master cylinder (MC) level was good. I assumed I just needed to bleed the brakes. After looking at the (four) disc brake calipers I determined that I should just go ahead and replace them all and put new pads in. So I did that and bled them (properly). I still needed to pump them.
A friend suggested that master cylinder was bad and since they are inexpensive I decided to replace it. I bench bled it first and then installed it. I then bled the brakes again, this time I used my wife to help (my big mistake). After listening to her complain about her leg getting tired by the time I got to the third wheel I did what any panicked husband might do and I stopped paying attention to what I was doing and I ran the master cylinder dry.
So I filled the master cylinder back up and bled it on the vehicle by loosening the master cylinder outlet lines and then bled my brakes again. Now I have to pump the brakes a few times to get pressure. Then as soon as I let off the pedal and let it return fully to the up position and wait three seconds, the brake goes all the way to the floor again and I have to pump them a few more times to build pressure.
I do notice that when the brake pedal is being pushed in, more times than not I will see fluid splash around in the master cylinder. On occasion I will see fluid splash in the master cylinder when the brake pedal is released as well.
My ABS light is on and I believe that it was on when I purchased it, but I am not sure.
From what I can figure out is that once I screwed up and bled the master cylinder dry, I introduced air into my ABS valves. That even though I bled the brakes again, half of my ABS valves remain closed and not accessible to bleeding without an NSG Scan tool.
My questions are:
01. Does this sound correct?
02. Is there a way for me to do this without the expensive scan tool?
03. If not, then is that scan tool something that most mechanic shops would possess?
04. Do you have any suggestions/advice or recommendations for me (other than advising me to not let my wife help me again or that I need to man up and not let my wife panic me)?
have the same problem?
Thursday, October 20th, 2016 AT 5:39 PM