How to know if a wheel cylinder is bad?

[Fox Body]

Glad it has gotten a little better. You may need to bleed again. Are you bleeding the entire system by starting at the back passenger brake, then back driver then front passenger then front driver? It doesn't have to be this but I'm just throwing this in as a diagnosis. How long have you had the car? Maybe you're just not use to the braking which may vary from car to car. It could be the proportioning valve.

When I first got my '79, the brakes where really soft and you would have to press them it down really close to the floor b4 it would start braking. It'd brake fine, but something just didn't seem right. It would have a LOT of play the first few inches and then at the bottom of the range, it would all of a sudden start braking and would be kinda touchy. I went through the entire braking system starting with the easiest thing first: bleeding the lines a few times, changed the master cylinder (these older cars are great, MC only cost $20 ), checked proportioning valve and it was fine. FINALLY I decided to change brake booster (big black round thing up against the firewall on the driver side at the top). Took a couple of hrs but that was the problem. Now the car stops great! Sorry for being so longwinded. Basically, you may want to check the booster.