what happens when a iron brake prop valve goes bad?

[BoostKillsStres]

I have bled about 5 coffee cups of fluid through my DS caliper and it still has big buddles coming thru the line.

I'm using clear tubing into a clear cup w/ the hose end submerged, open the valve and then go slowly pump the brakes but the bubbles never stop coming. The rears seemed to come out good as the bubbles stopped and the PS caliper seemed to come out good too. I just installed a new powermaster because I thought my old one was defective but I have the same pedal almost to the floor and with a little effort I can push it to the floor and the brake light never comes on. The new PM cycles with each full pedal stroke so it seems to be working fine just as the old one was.


HELP!!!!!!!!!!!!!!!!!! ME!!!!!!!!!!!!! PLEASE!!!!!!

TIA

 

[Roger]

According to the information I've been able to gather - when the iron proportioning valve goes bad - it's almost impossible to bleed the system & the pedal will be low.
I bought mine at a local dealer & the only thing missing was I never saw the gun when I was robbed. I understand Canada will still replace it free, but I paid almost $90 in the US.

 

[BoostKillsStres]

Thanks Roger, it seems to be what I'm running into. I'm trying a gravity bleed now and lets the rears drip for 75 min and I plan to let the fronts drip even longer but for some reason they've gotten to the point where they've almost stopped dripping which seems very strange. They're only dripping about once per 15 sec.

Anybody else???

Update: Well, the gravity bleed didn't do squat, still basically no pedal. I checked the rear drums and there nice and tight with abotu 90% of the shoe surface being used so they can't really go any tighter.