Brakes

First, i'm sorry for all the threads i've been making lately, but shits been hitting the fan with my truck lately.

I replaced the brake lines on my truck after busting one post lift. One brake line I was able to get on the L fitting, the other one I stripped to shit and attached it directly to the coiled part. After the swap, I did a full flush on all 4. I use a dot 3+4 combo from Advanced if that matters

After a week or so, today, I completely lost brake pressure. All the way to the floor and I hardly stopped. It would return randomly... now it only goes all the way to the floor. I've bled the lines twice today. A bit of air came out... but not much.

Since it happened so suddenly, I wouldn't think its the master cylinder. I'm pretty sure I attached the brake lines fine since they were working for a week... Although I can't find anything this generation Toyota specific, everyone seems to say master cylinder.

I have no idea whats going on but its not safe to drive my truck right now. Hoping to get it fixed asap.

Thanks

 

were they working before this? Id suspect air in the line or a leak if it was working properly before. If you still suspect the MC...not that big of deal to replace that either.

 

if there are no leaks present then I would suspect a master cylinder, when the truck is off is the brake pedal hard ,if it can be pressed to the floor with the truck off then its a bad master cylinder

 

I was educated on TTORA there's some valve I'm supposed to bleed before doing the wheels, I'll have to try it when I have time. Hope it's just air.

Didn't know to try it when the trucks off. When bleeding them, it wouldn't depressed when the valve was closed, so still suspecting it's not the Master