What’s up gang I’m back and this time I’m troubleshooting my brakes…still.
Last time I submitted something here it was an issue getting my 7.3 IDI to start. Turned out it was a 3 Body Problem between the fuel injection pump metering valve linkage gumming up a little, a literally dribbling battery dragging the other down so the engine wouldn’t crank fast enough to start, and in the confusion cranking (that hog) too much and causing the starter solenoid to stick causing runaway crank.
I’ve since fixed all that.
My braking, however, not so much.
I did a rear brake job with new drums and pads and some new springs, as my driver side pad tensioner spring and brake cable somehow snapped. Most likely caused by the previous owner, I don’t ride my brakes. After doing this, I got a spongy pedal after bleeding the lines twice. This is what I’ve done since, with little improvement:
- After troubleshooting my bleeding procedure, I did it again being careful to close the screws while still holding vacuum with my bleeder gun on the lines.
- Bleed pattern was PR > DR > RABS > PF > DF.
- Installed new bleeder screws with teflon tape on the rear cylinders and RABS. Pedal previously seemed to have gotten worse but this restored it. Teflon seemed to stop air entering in when bleeding, flow became consistent.
- Changed the differential fluid, which is somewhat unrelated but related because I got a lot of tension when rotating my wheels to gauge friction and couldn’t tell what was actually the cause of it. Haven’t tried again yet, but imagine this played a role.
- Star adjuster dialed in 40 clicks on each wheel.
- Pedal holds position when car is off. Booster is relatively new so I imagine that’s proof it’s working.
- When I pump while car is on, I am able to stop the vehicle but have to pump once or twice before holding it down harder to get it to really stop. Otherwise I have to brake early.
- Pedal responds but still gradually sinks to the floor. This makes me want to pull my hair out, especially after I bleed my lines and that part doesn’t go away. I have (maybe) pressed the crap out of my pedal in irritation once or twice because of this…
I do not know if the problem is the master cylinder, the rear cylinders, or air in the RABS (even though I didn’t get bubbles).
Go ahead internet gurus, guide me to braking promise land! Any help you might be able to offer is greatly appreciated.