Where the brake gurus at?

2006 trd . Practically new brake system, spongy pedal with slight squeak upon releasing pedal. Used techstream to activate module solenoids. Little or no fluid to rear but front bleeds well. After doing active test on every single solenoid did another bleed with same results but brakes felt like new. Sat a few hours and brakes returned to the spongy pedal and squeak. Checked all relays, bled mc and all that. Aside from blowing air through rear lines I’ve done everything I know to do. I don’t understand how cycling through/activating the solenoids would produce a perfect pedal then a few hours later it’s back to normal. Even replaced booster that was under warranty in case I got a bad part. Any ideas or testing to defeat this bastard? I have a feeling this will be something so minute but I can’t get it. Thanks for any help. I’ll try to upload pedal action later

 

Sound like you have a leak somewhere in the system....check your lines and connections to the callipers & bleeders . Do you have any pictures?

 

Yeah I made sure everything was nice and tight. It’d have to be a tiny hole I’m not seeing but always a possibility. I was able to get fluid to drivers side rear with a pressure bleeder but the right rear will spit every now and then but no steady flow. What pics would help? I could hear a slight hiss when pressing, another reason I changed out booster but could be a hole.

 

If the right is spitting and no steady flow there is air still air in the line.

 

Have you bench bled the master. If there is air in there, bleeding the brake won't get it out and it will always be spongy.

 

You still got air somewhere in the right rear, keep bleeding it

And check the brake shoe adjustment for good measure

 

Agreeing with air still in the line. I’ve found bleeding quickly helps. Meaning pump, hold, crack open, pedal bottoms out, close, then start over quickly. If that fails you could try a hose tightly on the bleeder nipple loosened, the other end of the hose in a container with a little brake fluid in it. Pump the pedal up and down, some fluid will push out pedal down, a little will draw back in pedal up. If you use clear hose, you’ll eventually see the bubbles stop.