mcutlass1969

Here is the issue. I have bled the breaks 4 times and again last night. The pedel still goes way down and breaks are soft.

Here is some background on where it all started. It is in a 69 Cutlass S. Did an engine swap where I had to move the modulator for the Header. I moved it up onto the firewall upright about 18 inches below the power master cylinder. I have checked and the garage floor is dry so there is no leaks. I have also forked the breaks many times.

Is it my power boster?

don71

Did you BENCH BLEED the master cylinder before installation?

"forked the brakes many times" What does that mean?

Are you sure the rear brake shoes are adjusted to be slightly dragging on the drums?

NO, I don't think its your power booster.

bulldog

I assume by modulator you mean the proportioning valve,If you have removed the brake lines then the valve is likley stuck in a closed position if this is the case then you will only have working brakes on one end of the car.The only real cure is a new valve.The only other thing it could be is that you're not bleeding the brakes properly,Start with the passenger rear first then the other rear,move to the passenger front next and last wheel should be drivers front.Also try bleeding the mastercylinder as well. Good Luck.

mcutlass1969

Thanks. I might pull the proportioning valve and check it out. Just a note that my term forking the brakes is adjusting them down to a slight drag. As all of us we are trying to make things work without spending the tons of money to buy disk brake kits.

don71

Hey I here ya, I lucked out $ on buying a parts car. It had everthing I needed for my disc swap in my 71. I think it totalled about $260 to do it all. I too ran into a problem with my proportioning/combo valve. Got a new one from master power brakes. Its the best swap/mod I've done on my ride. Should have done it years ago. Good Luck.

Chumley

Is that a company, "master power brakes" ? If so, do you have a web address or anything for them? I think I have a stuck proportioning valve also, or at least it's not working as it should.
Chumley

Oldsguy

I hear that, especially in this day and age, every dollar saved is a dollar more to go into the gas tank of the daily driver.

don71

http://www.mpbrakes.com/ part# VL3350