Just replaced master cylinder...breaks are rediculously spongy now...won't even stop

[ukiltmybrutha]

Ive always have had issues with bleeding these trucks and the best way Ive found is to use a vacuum bleeder like this http://www.ebay.com/itm/Brake-Fluid...0647256964&pt=Motors_Automotive_Tools&vxp=mtr I bought one for under $30 from harbor frieght that works really well.http://www.harborfreight.com/brake-fluid-bleeder-92924.html

I don't think this is a bleeding issue anymore though.

 

[Tempted]

You most likely over tightened the brake line banjo bolts. I've done that before and what it does is not allow any fluid to the caliper.

 

[ukiltmybrutha]

You most likely over tightened the brake line banjo bolts. I've done that before and what it does is not allow any fluid to the caliper.

I am getting fluid to the caliper now, but please check back a few threads and you will see the issue that I am fighting now. Thanks

 

[Tempted]

Sponginess and air in the lines. If fluid can't get through, or get through without blockage, you will have the issues you are speaking of. Slow brake response and a weak pedal. At this point you should stop thinking about the brake booster. A failing brake booster will cause a heavy/firm pedal most of the time. It sounds to me like you aren't getting the volume you need to the calipers in the time you need it.

 

[ukiltmybrutha]

Sponginess and air in the lines. If fluid can't get through, or get through without blockage, you will have the issues you are speaking of. Slow brake response and a weak pedal. At this point you should stop thinking about the brake booster. A failing brake booster will cause a heavy/firm pedal most of the time. It sounds to me like you aren't getting the volume you need to the calipers in the time you need it.

Interesting....but what about the neverending bubbles in the master reservoir when I press the brakes? That has got to be a symptom.

Thanks

 

[Tempted]

That can happen with blockages because its impossible to bleed if the system can't cycle enough fluid. If you have no leaks and the master cylinder is new, the chances are that something is just over tightened or possibly a blockage somewhere in the lines.