90 really very bad brakes

Maybe 2 months ago, all pipes were installed back in to me 90. Got new master cylinder, a new section of pipe, bled them out, brakes worked fine. After a few days, brakes went spongy again. Checked ALL pipes, all joints, everydin. So decided i had simply bled them out incorrectly. Bled them out again. Brakes stood up for a good 3 minutes! spongy. decided balls to it, had other werk to do. Took the wheel off, then the drum, all of about 2 months later, to find the slave cylinder was leaking. Cleaned up the drum, ordered new shoes, and 2 new slave cylinders. All fitted, the brakes were allright, braking was massively improved, not the pedal though. When pressure is built up, the brake pedal stays at the top, where it should be. I can press as hard as i want on it, it will stay at the same point. If i start rapidly pushing the pedal, it drops straight to the floor. with only a tiny bit of braking. So, that's no leaks, new master cylinder, new slave cylinders. WHAAAAT.
Could that be servo? or am i just an idiot?

probably still got air in them, try using an easy bleed kit

Okay, i'll see about that then.

Bleeding the brakes can be a bugger. You might try clamping the flexi hoses in turn to see which end the problem is at. And always buy genuine lucas/girling parts if possible. The seals in the cheap copies only last for months sometimes - been there.

zeaphod said:

Bleeding the brakes can be a bugger. You might try clamping the flexi hoses in turn to see which end the problem is at. And always buy genuine lucas/girling parts if possible. The seals in the cheap copies only last for months sometimes - been there.

Click to expand...

Okay, well i just bled the feckers out again. The brake pedal feels good for now, how long it will last is another matter.