First let me clarify I was having no brake issues. I was simply doing a 200K miles maintenance and was changing brake fluid. So before I started all worked fine.
I pumped out the reservoir leaving about 1/2 inch of fluid in bottom. (Same as on my wife’s car). I refilled with new fluid to top. Replaced cap.
I then bled the lines in order recommended (rear drums first) and they seemed to go well, but when bleeding the front brakes my wife indicated the pedal was very spongy. I finished up as normal but brakes are very soft. After watching videos I decided to bleed the master cylinder. I bought a bleed kit and bled it still installed. Lots a bubbles came out and the pedal hardened up and bubbles stopped. I thought hey it’s fixed. I closed up the MC and cranked the truck and started to drive but problem returned…
I am curious if I can just bleed the lines now? Or should I start over and bleed the MC again before the lines?
I have ABS module in middle of truck under the drivers seat. But remember all was working well before I started so I find it hard to believe that I now have bad parts?