Hows it going guys. Just finished boosting my ls.i also replaced the brake booster check valve and all. But with the turbo the pedal gets super tight. No vaccum leaks i checked for those. Is it because of the turbo inducing soo much air? Should i put a vaccum pump in the car?

 

Is the check valve pointing in the correct direction?

 

yes the check valve is in the right direction. Im getting so much vaccum its causing my calipers to lock shut.

 

Your master cylinder and booster spacing is not adjusted properly.

 

Thats not how your booster works. Next check is what Tyson suggested.

 

its just the front calipers sticking. i replaced booster, I've replaced the check valve, I've created space between master cylinder and the booster. i replaced the calipers and they're still sticking. prop valve? abs? i pulled all the fuses and the motor relay for the abs. i also drove with the ebrake up to try to get the abs to disengage and didn't get anywhere with it. I'm lost. my pedal isn't sinking to the floor. and my rears aren't sticking at all.

 

You didn't adjust it properly.

 

so the booster and master cylinder isn't adjusted properly? do you know the spacing ive looked everywhere and cant find it. and since my front calipers are sticking would the rod on the booster need to be shortened to shorten the throw of the pedal or do I need to elongate the throw of the rod?

 

its in the manual.

 

 

thats not it.

 

Is it because he has a master that’s mismatched to the booster? No info on chassis/master/booster was provided. Would he have to shim the master off of the booster in some case I’ve never run into?

 

I believe this is what Tyson is referring to

http://my.cardone.com/techdocs/PT%2053-0001.pdf


There used to be a honda-tech thread on how to do it, but haven't found it

 

had nothing to do with the adjustment on the booster. its the abs. checked continuity on the system. she's getting power. i think the pump is completely shot I'm not getting the hum when she turns on. no abs light no codes for the pump being over run. i disconnected the abs module and was seeing if it would do anything tried to jump the system even bled it. still nada. i think the pump **** the bed and won't let fluid return and causing the front calipers to lock up.

 

The manifold is not under vacuum when the turbo spools....

And decel will not pull any more vacuum than NA.

 

What do you mean it gets super tight?

Ar the brakes clamping without your foot being on the pedal?

 

if I bleed the calipers to release the pistons, then I can spin the rotors. if I pump the brakes even a few times they lock up again. the abs module I think is bad. the relay and all is getting power. so I think either the module is bad or the pump for the abs is bad itself. its allowing fluid to pass through but not to release back out. it has new calipers new brackets new guide pins.

 

Has the unit ever been serviced? ABS modules need to be bled as well.

i totally forgot about that adjustment. I think I even have the tool floating around somewhere. That guide pretty much covers the process.

 

Yeah I think the thread showed how to do it without the special tool, i don't remember 100% as it was years ago.

I am getting ready to swap to integra rotor\calipers in the front of my 93 si and a 15/16th MC from a 91 ex so this adjustment has been in the back of my mind

 

did you get this sorted out?

 

Also curious to see if you got this solved yet.

 

Must have figured it out. If not, you need to open the brake line for the front on the master, and see if the wheels brake free. If not work your way down until you find the spot where it squirts fluid. The point before the line you open will be your blockage. Start at the beginning, not the end.