Help, 91 No front brakes, but rears work fine
Ive searched online and can't really find much helpful info for this year. I'm having a problem where the front brakes aren't working. At all. Press the brakes and wheel still turns from the fronts. Press the brakes and the backs tighten like they should. I get fluid coming from the lines to the front calipers, but after one pump of trying to bleed the brakes I don't get any fluid coming out at all. (Both sides) I tried to bleed each side at least 10 times and still nothing. I'm using the 2 man bleeding technique where one pushes the pedal and the other looses/tightens the bleeder screw. Still no front brakes. The master cylinder is always full and never lower then minimum when doing the bleeding. There seemed to have been a leak from the mc to the brake booster, but it doesn't leak anymore, Has signs of rust from where it leaked from previously, But no sings of leakage now. I looked over the brake lines for any leaks and/or rusted lines but nothing I can tell. I do have a minor vacuum leak from the brake booster as well tho, when you press on the brakes the idle goes lower and sounds like it misfires.
I also did a change of calipers that worked from a previous car and still no front brakes. I'm kinda more them stumped. Should I flush the system with new fluid? Did I do the bleeding process wrong? Is my master cylinder seals damaged from the inside? Should I look into the proportioning valve? Is the minor vacuum leak the main cause of my front brakes not working??
Again back brakes work fine, they are drum brakes. This is a automatic fwd wagon and the emergency brake has been cut also, not plugged.
Any thoughts?
Comments
could be the front brake lines might be clogged or like you said the brake booster has a leak and causing it to fail, i say do a complete brake fluid flush you never know how long its been since that's been done
Dunno if it's more related to the issue or adding on. But I found out one of my bleeder screws is letting it leak from the nipple or treads. Anyone know where I can get new ones? Or atleast ones that fit my oem front calipers?
i believe a regular the same era or just the correct size fitting will work i think auto store's carry them not for sure though