AE85 brakes issue - Toyota Nation Forum : Toyota Car and Truck Forums

rhymz · 03-13-2011, 01:18 AM

hey guys, i have an AE85 with a strange braking problem that i would love to have some help with...

problem is when im driving the brakes pedal travels straight to the bottom b4 i get any amount of braking going on...i bleed all 4 wheels starting furthest first. when car is off the brake pedal feels as it should, when the car starts and the booster is activated i have to press all the way down for actual brakes...any thoughts...it feels as though there is air in the line but i bleed these things more than 3 times already

i have a new booster and master cylinder in as well, if that helps

TE-72_Junkie · 03-23-2011, 01:06 AM

either you have a leak somewhere or your booster or m. cylinder are bad sometimes they are bad from the parts store

rhymz · 03-25-2011, 08:54 PM

change the MC and i found i had a bad wheel cylinder...replaced with brand new aisin unit...now when i bleed everything and the car is off it needs firm as it should...when the car starts and the booster is working it feels very spongy and i have to press way down to get brakes?

corolla_nut_83 · 05-29-2011, 03:20 PM

Quote:

Originally Posted by rhymz

change the MC and i found i had a bad wheel cylinder...replaced with brand new aisin unit...now when i bleed everything and the car is off it needs firm as it should...when the car starts and the booster is working it feels very spongy and i have to press way down to get brakes?

Well I'll start with a few questions. Did you bench bleed your master cylinder? 2 How did you bleed your brake system I.E. with another person, power bleeder? 3 Are you sure that you don"t have a loose brake line or another bad wheel cylinder or caliper? If all that was done I would make sure and maybe try bleeding the system again and bleed each wheel 3-5 times each.

corolla_nut_83 · 06-26-2011, 02:11 PM

I would say you might have a problem with the way you are bleeding your brakes. Or possibly have a loose brake line.

rhymz · 06-26-2011, 08:30 PM

hmmm i was also thinking along the lines of a loose brake line...i did bench bleed the master until all the bubbles disappeared...hmmm anyone think i should bleed the brakes with the engine running so that i can have booster functionality