Hydroboost problems..
04-16-2018, 10:37 PM
#1
Thread Starter
Join Date: Aug 2010
Location: florida
Posts: 6
Hydroboost problems..
I need help!!! I Have a project car that’s using a Hydroboost brake system out of a mustang because a normal vacuum booster does not fit. I am having issues with it, was wondering if you guys could give a helping hand on possible Hydroboost do’s or donts, or specific bleeding procedures?
Brand new master, got a mustang Hydroboost kit including pump. Installed everything, drilled pedal 3/4” higher. Bled brakes, bled PS system. Pedal goes to floor and stays there, have some rear brake action but less in the front. I can still turn the wheels with my hand when pedal is to the floor, I can feel friction. Any ideas what this could be??? Been at it for about 2-3 weeks and have 0 clue what could be the issue....
Brand new master, got a mustang Hydroboost kit including pump. Installed everything, drilled pedal 3/4” higher. Bled brakes, bled PS system. Pedal goes to floor and stays there, have some rear brake action but less in the front. I can still turn the wheels with my hand when pedal is to the floor, I can feel friction. Any ideas what this could be??? Been at it for about 2-3 weeks and have 0 clue what could be the issue....
04-16-2018, 11:55 PM
#2
1st Gear Member
Join Date: Mar 2018
Location: wa
Posts: 107
I need help!!! I Have a project car that’s using a Hydroboost brake system out of a mustang because a normal vacuum booster does not fit. I am having issues with it, was wondering if you guys could give a helping hand on possible Hydroboost do’s or donts, or specific bleeding procedures?
Brand new master, got a mustang Hydroboost kit including pump. Installed everything, drilled pedal 3/4” higher. Bled brakes, bled PS system. Pedal goes to floor and stays there, have some rear brake action but less in the front. I can still turn the wheels with my hand when pedal is to the floor, I can feel friction. Any ideas what this could be??? Been at it for about 2-3 weeks and have 0 clue what could be the issue....
Brand new master, got a mustang Hydroboost kit including pump. Installed everything, drilled pedal 3/4” higher. Bled brakes, bled PS system. Pedal goes to floor and stays there, have some rear brake action but less in the front. I can still turn the wheels with my hand when pedal is to the floor, I can feel friction. Any ideas what this could be??? Been at it for about 2-3 weeks and have 0 clue what could be the issue....
A manual will tell you to use a vacuum bleed system which is very complicated and requires tools that many shops do not have. Another alternative that we find works well is as follows:
- Jack the vehicle up so the tires are just clear of the ground.
- Make sure the steering wheel is centered and start the engine.
- SLOWLY turn the steering wheel to the right half an inch from center and then left half an inch from center. Continue to do this SLOWLY increasing the amount you turn the wheel half an inch at a time until you are going lock to lock. This process should take at least a half hour.
- During this process, it is important that the fluid level in the pump remain above the pump casting so you do not introduce more air in the system.
- If you get small bubbles appearing in the fluid, you have to shut the vehicle off and walk away until the bubbles are all gone. If small bubbles re-appear, you need to shut the engine off again and take another break. There is no way to speed this process.
- Once you have gone through this process the steering and brakes should work.
https://www.larescorp.com/tech-tips/...-instructions/
04-18-2018, 11:17 PM
#5
Thread Starter
Join Date: Aug 2010
Location: florida
Posts: 6
So I have another question, do you guys know if you have a properly working master cylinder, if you remove it from the booster/hydro is it possible to fully compress/push in the piston by taking the master and pushing the master with your hand against something hard like the edge of the booster/hydro, or firewall? If that made no sense I totally understand haha
04-19-2018, 05:45 PM
#6
3rd Gear Member
Join Date: Feb 2013
Location: PA
Posts: 556
Sounds like a faulty master, i don't know what your experience level is but you do realize bleeding the booster is completely different than bleeding the brake system.
If the peddle is going to the floor you have a brake system issue
If the peddle is going to the floor you have a brake system issue
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