Brake pedal low

Brake pedal low and sinks, low pressure to rear on my 2005 tacoma

 

Check the clearance at the rear brake shoes

 

Is your brake fluid full? Do you have a vacuum brake booster or hydraulic brake booster?

 

I'm new at this. Just tryed every website I could find to figure out this problem, first issue was the brake pedal started going to the floor and you can tell that the front brakes are the only ones stopping the truck. I lifted the rear of the truck off the ground and the rear wheels will stop but not as it should, anyway I have no leaks anywhere in the lines all new shoes,pads,wheel cylinders,hardware and master cylinder used 1 gal on new fluid through the entire bleeding process. Pedal still low and spongy. Any ideals? Thanks

 

At any point did the fluid in the MC reservoir get empty?
Could it be possible you have air trapped in the ABS module?

 

No on the fluid, had a friend help out and he kept it fill. That is possible but not sure how to bleed that out.

 

It is possible although not likely for one of the valves to get stuck in the ABS module and cause this, if you have no ABS or traction lights on you can try this: find you a gravel or dirt road or some place like that where you can safely do a hard stop that will cause the ABS system to actuate, sometimes this will fix it if it's a sticky valve.

 

I'm willing to try that, I will do it tomorrow and yes there are no lights on. I'll give it a shot and post the results tomorrow. Thanks!

 

Fingers crossed that fixes it, I've had it fix a couple that had sticky ABS valves, just make sure you're in a safe area where you won't hit anything if it doesn't stop as fast as you expect it to.

 

I never thought about using a gravel area to actuate the ABS.
Nice idea @Dm93. I always figured you had to use a scan tool to bleed the ABS module.

 

You can do an automated bleed but I've never had it do anything for a sticking valve, I have had some success with ABS stops fixing them though.

 

Did you properly adjust the rear brakes after the replacement? If you didn't that is the problem.

Remember expand until the drum locks, then back it off 15 clicks on the star wheel.

 

Don’t even need gravel. Just mash brakes enough for ABS to kick on a couple of times. Then bleed again.

 

Gravel road or dirt is best makes it easier to lock the brakes up and it’s fun to slide a bit
Had this issue in a Mazda, googled issue, said to do just that.
Do it a few times and hard
If that doesn’t work could be expensive