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-   -   Brake problems (http://www.diychatroom.com/f46/brake-problems-183576/)

Clutchcargo 07-13-2013 05:52 PM

Brake problems
 
I've working on my fathers car. It's a run of the mill '96 Ford Taurus. One of the two brake lines running to the rear rusted out and he lost all of the brake fluid getting it home.
I decided to replace both of the rear brake lines because the other one looked pretty bad too.
Now I cannot seem to get the air out of the system. I'm up to 3 laps around the car with bleeding and it still has very spongy brakes. I must have gone through a half gallon of brake fluid.

Any ideas would be greatly appreciated.
thanks,

sublime2 07-13-2013 05:59 PM

You have to bleed all 4, one at a time.
Make sure the cap for the brake fluid is tight before attempting to bleed.
Intionally your looking for flow of the fluid without bubbles not a hard pedal. After a couple rotations you should see a hard pedal.

joecaption 07-13-2013 06:20 PM

Slowly depress the pedal, do not release it until someone has closed off the bleeder valve. Repeat.
The front and back should be two different systems, only work on one set at a time.

Clutchcargo 07-13-2013 06:37 PM

That's exactly what I did, 3 times, and there's no air coming out but it seems there's air trapped somewhere. In the past, I've successfully replaced calipers and master cylinders but this is the first time replacing brake lines.
There's got to be something I'm missing or a method of bleeding that is different than the standard, open bleeder, depress pedal to floor, close bleeder, release pedal, repeat.

sublime2 07-13-2013 06:58 PM

Quote:

Originally Posted by Clutchcargo (Post 1215482)
That's exactly what I did, 3 times, and there's no air coming out but it seems there's air trapped somewhere. In the past, I've successfully replaced calipers and master cylinders but this is the first time replacing brake lines.
There's got to be something I'm missing or a method of bleeding that is different than the standard, open bleeder, depress pedal to floor, close bleeder, release pedal, repeat.

Try a search on YouTube.
Found many a video showing how to fix things.
https://www.youtube.com/watch?v=eZpe...e_gdata_player

Oso954 07-13-2013 07:19 PM

You probably need to cycle the ABS module.
It takes a special scan tool to do it.
Or some guys report success by driving car (if they have enough brakes) and braking hard enough to activate the ABS module. Then re-bleeding brakes.

Otherwise, call brake shops and ford garage to see if they have the scan tool to cycle the ABS module. IF they do, have them bleed the brakes.

Burgiebill 07-13-2013 07:26 PM

Does your car have a proportion valve? Under m/c two lines go into a proportion valve. If u r not getting any air u may need to cross bleed the system. Bleed a little out of the left front then the right rear. If this does not help try the other corners. Needles to keep the m/c full. Also when bleeding don't let the person foot go all the way to the floor. U control this, them them, " down" push on the peddle, you just let a little fluid out, then tell them again. Also with ANY peddle pressure check the new lines for leaks. Hope this helps

Burgiebill 07-13-2013 07:30 PM

Quote:

Originally Posted by Burgiebill
Does your car have a proportion valve? Under m/c two lines go into a proportion valve. If u r not getting any air u may need to cross bleed the system. Bleed a little out of the left front then the right rear. If this does not help try the other corners. Needles to SAY keep the m/c full. Also when bleeding don't let the person foot go all the way to the floor. U control this, tell them, " down" push on the peddle, you just let a little fluid out, then tell them again. Also with ANY peddle pressure check the new lines for leaks. Hope this helps

Forgot a couple of words,

rustyjames 07-13-2013 07:31 PM

Try cracking the right rear cylinder bleeder valve and leave it open until brake fluid starts streaming out. Close that bleeder and repeat on the left rear. Sometimes it helps to tap on the cylinder to release trapped air. That should get you in the ballpark where you should start getting some pedal pressure to start the bleeding process. Always start at the cylinder farthest from the master cylinder.

Burgiebill 07-13-2013 07:40 PM

Quote:

Originally Posted by Burgiebill
Does your car have a proportion valve? Under m/c two lines go into a proportion valve. If u r not getting any air u may need to cross bleed the system. Bleed a little out of the left front then the right rear. If this does not help try the other corners. Needles to keep the m/c full. Also when bleeding don't let the person foot go all the way to the floor. U control this, them them, " down" push on the peddle, you just let a little fluid out, then tell them again. Also with ANY peddle pressure check the new lines for leaks. Hope this helps

I miss a couple of words,

Needles to sat keep the m/c full


U control this, tell them

Clutchcargo 07-13-2013 08:05 PM

Interesting, cross bleeding... I haven't thought of that. Yes, two lines go into a proportion valve and yes, I'm not getting any air out.
Does the order of bleeding really make a difference? I always start at the far corner and work my way toward the mc (Right Rear, LF, RF, LF).
Why not push the peddle to the floor?

Burgiebill 07-13-2013 10:14 PM

It does not take a lot, if u have a pretty good peddle just a little then to left front. If not try the other corners. Good luck. Bill

Burgiebill 07-13-2013 10:19 PM

Sorry, we never pushed to the floor, it took a little longer but not much chance of sucking back air. Worked in a brake and front end shop, the worked for a Chevy dealership for about eight years. Plus all the destruction I could do to my own cars when I was young. A lot of "school of hard learning"

Burgiebill 07-13-2013 10:32 PM

Sorry, rustyjames is correct, do the right rear then left front. THEN do the left rear next right front.

Hardway 07-14-2013 06:25 AM

Quote:

Originally Posted by sublime2 (Post 1215469)
You have to bleed all 4, one at a time.
Make sure the cap for the brake fluid is tight before attempting to bleed.
Intionally your looking for flow of the fluid without bubbles not a hard pedal. After a couple rotations you should see a hard pedal.


"You have to bleed all 4, one at a time."
Really and how do you do this?:eek:


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