1991 Audi 90Q20V, Doing the procedure acording to 20v.org.
For some reason the back brakes are very hard to bleed been pumping it for a while. I have a self bleeder kit so I can see thru the clear hose that the brake fluid flow very little. I barely see any bubbles.

I have a friend who is pumping the brakes while I look at the self bleeder. While he holds the brakes down the back brakes do not grip the rotors. But when he turns the car on and steps on the brakes the rear grips the rotor with force.

Also when the car is on I tried the brakes and I feel a slight pulsing when I step on the brakes lightly. When i step on it hard i feel it pulse more. The ABS light in not on.

Is this normal? Any help would be appreciated as I want to know if I'm safe or not with this.

Thanks

oops, you know what I didn't do this.........

Also, the book says if you have "height sensitive brake pressure regulator", press regulator lever firmly towards rear axle when bleeding rear brakes. The height proportioning valve sits on the rear trailing arm on the left side of the car. Jack the car up, locate the valve and insert a 6mm drill bit between the lower spring hook and the roller to fool the valve into thinking that the car is fully loaded so it will bias the brake pressure evenly front to rear. The valve either works or it doesn't. If it's frozen or the spring is missing (broken) nothing happens there. It's expensive, and given what it does, not an absolute critical item. But you should have rear brakes of some sort, even if the valve is broken. It operates in a narrow percentage band of rear bias, never shutting off the rear or the fronts totally.

But is there anything alse I'm missing besides that?

Thanks

 

....push it. Push that and it bleeds really easy.

If you don't have the bias it will take FOREVER to bleed the rear brakes. Pump, pump, pump...open....etc. My CQ didn't have the bias valve, sucked!