One question regarding brake bleeding... I replaced the ABS pump in my 91 bmw
318i, and then got a motive pressure bleeder system and went at the brake system. I first jumpered the ABS pump relay so the pump ran a bit, then went to bleeding it. I have to wonder if the pedal feels ever so slightly ewither mushier or has slightly more travel now. Is there any real way to tell if you have a small bubble in the system? Why I ask is because I believe I got the sytstem OK, and the more Id use it driving, the better the pedal felt. However, it seemed that after turning off the car and pumping a few times so the pedal was prety hard, there was still a bit more travel than before. With the car on, a small bubble might not be that noticable, because the vacuum boost makes the pedal softer, due to the power assist, but would a small bubble become more noticable with the car off, comapred to with it on? I plan to rebleed at some point after I get the ABS squared away and working completely, but Im just curious, as I dont want any surprises. I know I got the bubbles out, as I bled for a while until the bubbles came (as fluid filled the abs pump) and then came all out and nothing but clear light new ATE SL DOT 4 was coming out with no small bubbles or solid junk. But you never know in a closed system like this, and i dont want my brakes to fail...
Any info or advice would be great. Thanks,
JMH