Long Travel Soft Brake Pedal

340sFastback said

I put a finish nail into rear brake line port in master cylinder and no residual valve was in there. My peddle has a mushy feel all the way down like 2/3 travel. But pedal always stops at same place and can't be pushed down further.

What method you use to bleed your brakes? Gravity bleed, pressure bleed, two man pump pump hold open bleeder?

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I mostly use pressure. I don't like the idea of vacuum because it can suck air in from cups, etc. Guys seem to have good luck with gravity in some cases.

Another thing you might try--which I've done, is to "rig," let's say the hose and caliper and disconnect the hose at the frame/ tube. Use a clamp an block to reverse bleed the caliper, IE force the hopefully pretty full caliper to eject air and fluid out the hose. Then bleed down to the hose/ tube connection by cracking the fitting there.

The sponge, don't know, may be an issue with the parking brakes. See if you can round up a couple of tube unions, usually 3/16 inverted flare, and a couple of same size plugs. Now you can disconnect the tube at the rear where it connects to the hose, and plug that. If you get a rock hard pedal, I'd investigate further into the rear calipers/ parking brake.