User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 11-18-2019, 02:13 PM #16
3bears 3bears is offline
Senior Member
 
Join Date: May 2015
Location: north east of Fairbanks Alaska
Posts: 1,785
Real Name: Joshua 3 Bears
3bears has a spectacular aura about 3bears has a spectacular aura about
3bears 3bears is offline
Senior Member
 
Join Date: May 2015
Location: north east of Fairbanks Alaska
Posts: 1,785
Real Name: Joshua 3 Bears
3bears has a spectacular aura about 3bears has a spectacular aura about
I thought I had a brake booster issue, but did not. But in research saw that OEM went anyplace from $70 to 800 bucks. the 800 being Toyota not an aftermarket OEM. All seem to come with check valves . However when a Toyota check valve alone is 60, makes you wonder about quality of a complete brake booster with check valve only $70.

If your new booster is not Toyota...maybe its the booster being a new one but funky
__________________
2000 SR-5 V6 Auto . Desert Dune, Spectre intake, Borla muffler, Magnafine tranny filter, B&M cooler, Talls, KYB, Airlift 1000, DRL delete, Big 3 wire, full rack, TBU, Swapped in Elocker, some LEDs, PIAA headlights, , Amsoil
3bears is offline   Reply With QuoteReply With Quote
Old 11-18-2019, 02:46 PM #17
ølaf ølaf is offline
Member
 
Join Date: Jul 2013
Location: Denver, CO
Posts: 41
ølaf is on a distinguished road
ølaf ølaf is offline
Member
 
Join Date: Jul 2013
Location: Denver, CO
Posts: 41
ølaf is on a distinguished road
Quote:
Originally Posted by 3bears View Post

If your new booster is not Toyota...maybe its the booster being a new one but funky
Thanks! It's definitely OEM, just not sure if its new or refurbished. Paid 690 for it through my shop. I also went ahead and bought (and returned) a new check Valve and Grommet from the dealer, to eliminate that. Even though the new booster came with one.

I'm planning on disconnecting the ABS tonight, just as a measure of eliminating that as a possibility. But as stated earlier, the hard pedal occurs way before the ABS would ever kick in.
ølaf is offline   Reply With QuoteReply With Quote
Old 11-21-2019, 01:21 AM #18
ølaf ølaf is offline
Member
 
Join Date: Jul 2013
Location: Denver, CO
Posts: 41
ølaf is on a distinguished road
ølaf ølaf is offline
Member
 
Join Date: Jul 2013
Location: Denver, CO
Posts: 41
ølaf is on a distinguished road
Bumping this up, to see if anyone can confirm vacuum readings on their intake plenum. I read just 17 in on mine, which seems low. Should be 20 I believe? Could this lead to a loss of vacuum (hard pedal) when I stomp on it?

Thanks!
ølaf is offline   Reply With QuoteReply With Quote
Old 12-09-2019, 01:01 AM #19
ølaf ølaf is offline
Member
 
Join Date: Jul 2013
Location: Denver, CO
Posts: 41
ølaf is on a distinguished road
ølaf ølaf is offline
Member
 
Join Date: Jul 2013
Location: Denver, CO
Posts: 41
ølaf is on a distinguished road
I solved the panic stop issue.
Seems like my pads and rotors were glazed (I had less than 1 yo Stoptech drilled and slotted rotors and ceramic pads, which had been recommended to me. No clue on how the glazing happened. A new set of OEM pads and rotors gave me some good bite back on panic stops.

The other remaining issue I'm still grappling with is a hard pedal on cold starts, particularly when at high elevation. Booster and check valve are new OEM. System has been flushed. Calipers are working. Rear brakes are adjusted. ABS is working.

The only thing I'm seeing now is that my engine vacuum at the plenum nipple is only 11 in, at a cold morning at 10,000ft. This might not be enough to clear the booster of any air. I started a new thread about that ...

- olaf
ølaf is offline   Reply With QuoteReply With Quote
Old 12-09-2019, 09:16 AM #20
brillo_76's Avatar
brillo_76 brillo_76 is offline
Senior Member
 
Join Date: May 2017
Location: Western PA
Posts: 1,901
Real Name: Jon
brillo_76 is a glorious beacon of light brillo_76 is a glorious beacon of light brillo_76 is a glorious beacon of light brillo_76 is a glorious beacon of light brillo_76 is a glorious beacon of light
brillo_76 brillo_76 is offline
Senior Member
brillo_76's Avatar
 
Join Date: May 2017
Location: Western PA
Posts: 1,901
Real Name: Jon
brillo_76 is a glorious beacon of light brillo_76 is a glorious beacon of light brillo_76 is a glorious beacon of light brillo_76 is a glorious beacon of light brillo_76 is a glorious beacon of light
Quote:
Originally Posted by ølaf View Post
I solved the panic stop issue.

Seems like my pads and rotors were glazed (I had less than 1 yo Stoptech drilled and slotted rotors and ceramic pads, which had been recommended to me. No clue on how the glazing happened. A new set of OEM pads and rotors gave me some good bite back on panic stops.



The other remaining issue I'm still grappling with is a hard pedal on cold starts, particularly when at high elevation. Booster and check valve are new OEM. System has been flushed. Calipers are working. Rear brakes are adjusted. ABS is working.



The only thing I'm seeing now is that my engine vacuum at the plenum nipple is only 11 in, at a cold morning at 10,000ft. This might not be enough to clear the booster of any air. I started a new thread about that ...



- olaf
I wonder if you need to put a vaccuum assist pump on when your at high elevations. So your vaccuum is where it's supposed to be.

Sent from my SM-J337V using Tapatalk
__________________
1997 4X4 V6 5 Speed Sr5 4 Runner (97 5 speed )
1997 4X4 V6 Red limited 4 Runner (97 Limited)
1998 4X4 V6 Sr5 Red 4 Runner (98 Tetanus1 )
1998 4X4 V6 Sr5 Silver 4 Runner (98 Tetanus2)
2001 4X4 V6 Sport Green 4 Runner (01 Green Sport)
brillo_76 is offline   Reply With QuoteReply With Quote
Reply

Tags
abs , bled , booster , brake , pedal

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hard Brake Pedal During Panic Stops - Brake Booster? Friday88 3rd gen T4Rs 23 11-01-2019 04:15 PM
Brake pedal hard to push down shoota 3rd gen T4Rs 40 04-23-2019 09:26 PM
Need help diagnosing Brake pedal “give” at stops Rancho5 3rd gen T4Rs 18 09-10-2018 05:16 AM
Hard Brake Pedal? Brake Accumulator? beatadrum 4th Gen T4Rs 2 02-17-2018 12:33 AM
Brake pedal hard to push? jarnld Classic T4Rs 5 05-14-2008 12:59 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 04:56 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Copyright © 2020