Have a 2000 Taco with brake issues

changed the brake booster and the master cylinder and cleaned all the lines and still doesnt want to stop any help would greatly be apperciated.
Thanks

 

What do you mean by "still doesn't want to stop"? Is the pedal soft, or is it firm and still doesn't have much stopping power?

 

it has no brakes after all this was replaced brand new

 

it still has no brakes doesnt want to STOP even after it got new items brake booster,master cylinder and cleaned the lines blew them out and Nothing it is a 4x4 ext cab SR5 with the V6

 

How does the pedal feel?

 

eh semi mushy

 

pedal goes down 1/2 to 3/4 and hardly any brakes come to a slow roll

 

could it be the brake porotioning valve? I hope not bc at my dealer they want 1400 for that small lil dam part

 

How did you "blow" the lines out and make sure there was no air in them?
New waster was bench bled before before installation?
Maybe your new master cylinder is bad? Was a a Toyota part?
Any leaks at the brakes or proportioning valve?
My guess is that you still have some air in the lines and need try bleeding them again.

 

we bleed the truck several times and no leaks anywhere never had a leak it just doesnt want to stop at all the pedal goes down maybe 1/2 3/4 and comes to a slow roll will not stop and it is driving me insane yes it was bench bleed and still NOT working could it be the poportioning valve bc at my dealer that small item is 1400

 

Sounds like the booster is not working correctly. Maybe a vacuum leak or it's not creating enough vacuum at the booster.

 

well thanks for that how can it be a vacuum leak when the hose goes to the manifold? it is driving me insane

 

If you have a vacuum gauge, you can test the booster. Tee the gauge into the line to the booster and start the engine. You should see the full intake vacuum. If not, pinch the line to the booster and see if the vacuum improves....

I found out the hard way on Toyotas and BMWs that I needed to put something behind the
brake pedal to keep my helper from pushing the pedal all the way to the floor while bleeding the system.
A short length of 2x4 works well. If I don't do that, I usually have to replace the master cylinder because its internal seals were pushed to far along the bore causing them to fail.

 

thanks for your help Ill have to see the vacuum tester tomorrow im burned out working on this Taco been doing since friday and had enough...But thanks a bunch for your help!

 

Best of luck. One other thought; if one of your caliper pistons is not sealing well in it's bore there will be a squishy pedal a small leak. There is not very much fluid in the system so any leak may not be obvious without a careful look and possibly removing the wheels.

 

thanks but this is all 4 wheels arent grabbing and NO brakes but back to the drawing board and figure this out thanks everyone for all your knowledgable input on helping me figure this out ill update everyone ones the problem is resolved thanks ...

 

Are the rear brakes adjusted up correct ??

Using the Parking brake keeps them adjusted .

If they are not adjusted much of the pedal travel is used filling the wheel cylinder .

Just what started this installing of new brake parts ??

 

Do these Tacomas have an electric booster pump? If they do and you swapped it out, its like a thousand dollar part or something like that. I don't have the fsm for the tacoma yet, but for my land cruiser of the same year there is an electric booster pump and also there was a very specific method to bleeding the brakes. Without the Toyota SST(special service tool) , couldn't do it by yourself and not really with a vacuum bleeder either. It required two people due to the fact the pedal had to only be pressed in part of the way. Otherwise couldn't get all of the air out of the lines.

Edit: just a reminder to everyone, the more specific and detailed info you give about the truck and what you or others have done to it, the better your chance of getting good, detailed solutions or info from us.

 

Any updates?

 

well yes got an update need to warranty out the new brake booster and master cylinders aren't working even though they are brand new so waiting for replacement parts to come in and should be back on the road by sat Iam hoping..