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2G Brake booster or abs

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frosh29

15+ Year Contributor
293
31
Jul 29, 2004
Wallington, New_Jersey
This all started when I replaced my two rear brake lines. I also opened the wrong brake flairs at the proportion valve (now closed obv). ive replaced the master brake cylinder, no fluid leaking anywhere, but when I press the brakes the pedal is soft unless I press the brake pedal twice in quick succession. I’ve also bled the brakes 3 times with the car Off and on.

Still get mushy pedal if I don’t hit the pedal twice.

Abs light is on. It’s a 95 so I can’t read the codes without a mut from what I’ve read.

Any wisdom someone can impart?

Thanks!
 
The ABS system is very tough to clear of air. You have to bleed a lot more to get the air out. Another way is to suck the fluid (and air) out with a power bleeder or fluid transfer pump hooked to the bleeders that are cracked open.
 
How did you bleed the brakes? There's a particular sequence to purge any air from the lines. I usually do RR, LR, RF then LF, furthest from the master to closest. I also use a mityvac air powered vacuum bleeder with a reservoir on the master cylinder.

This is the bleeder LINK
This is the reservoir I use LINK

You can bleed the abs module without the special computer to actuate the solenoids in it, and doing so is a major PITA. Even with the right tools you'll never get all the old fluid out, but it should purge 99.9% of the air.

Typically you're not going to manage to get air in the abs module that will affect braking normally anyway. I'd bet you need to bleed the brakes properly, and also make sure the master was bench bled and adjusted properly.
 
If you have access to a mightyvac, use it. If not, I like to gravity bleed because I'm lazy, and it lets me check over other parts of the car.

Attach 4ft of clear hoses to all the calipers and tape the other end onto the windows( end must be above the master cylinder). Throw a 12oz bottle upside-down, directly into the brake reservoir and leave it there(it will auto fill). Crack all the bleeders open and walk away. Check it every 5 minutes until it stops bubbling.
 
OK,

So, I did bench bleed the master, although I am not 100% sure I did that correctly. The piston stopped moving in and out by the time I was done. Is there a way to ensure it was (or is) fully bled now that it's on the car?

When I bled the brakes I did the RR, LR, RF, LF method with the car off, and on...multiple times. Had someone push the brakes down, hold, I opened the caliper bleeder, waited for everything to come out, closed. No traces of air on any tire after that process was done several times.

I understand that it SHOULD NOT be the ABS causing the "soft pedal" issue...

So, to recap, what can I do to ensure there is no air in the master cylinder? Also, what is there to adjust for the master cylinder.

I hope that's enough info and I appreciate the help!

Thanks!
 
These came with my master, so idk if it’s sold separately. If you can buy them, remove the lines and install these. Attach clear hose to both and run back to the reservoir. Fill reservoir and have someone pump the brakes until you don’t see any more bubbles.

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Just to clarify, you want to close the bleeder screws before it stops flowing, otherwise air goes back inside, a quick open, close. Once fluid comes out clear and you don't have anymore air bubbles, you're good.

Gravity bleeding works good as long as you have the time (i ain't got time fo' dat). Sounds like you may have a master issue, or still some lingering air.
 
Crack those two rear brake bleeders and let fluid gravity flow through them for a few hours, stick a hose on each of them and drop it into a bottle that has the hose end covered in brake fluid itself, do this one caliper at a time, check the master cylinder once in a while to make sure it stays a a decent level during this process.
 
Ok so there’s def a little air in the master I think. I changed a caliper on my 2002 stratus and there was some air in there before I bled and it felt eerily similar to the eclipse.

I’m going to start at the master and get back to everyone. Thanks for all the suggestions!

I’ll have an update tomorrow.
 
Did not get to it this weekend due to work. Will 100% do it tonight though for all those patiently waiting for the outcome.

Also, I got a friend at AutoZone that is going to lend me his ABS reader! It's nice to make friends (and spend a shit-ton of money in the process at the local AutoZone).

Updates later tonight!
 
I thought those bottles had to be ABOVE the master cylinder for gravity bleed... is that right? Or do they just have to have the ends in brake fluid?

You can do it either way. Above the master will never (shouldn't) run the master dry as it won't flow out of the tubing. Below is more of a flush where you will have to monitor the fluid level. Up to you which way you want to go.
 
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