Line lock not working.

[Wells.Strength]

I installed line lock on my 95, zero success, I figured maybe the ABS was messing with it or I got a cheap solenoid. Got a summit solenoid, deleted the ABS, still doesn’t hold. Apply the brakes by foot, holds fine, press the button and let go of the brake and it doesn’t hold, if I pump them it attempts to grab a hold but won’t even hold at an idle, apply more brake pressure with the button pushed helps a little more. Anybody have a similar issue and have a solution? Seems to me if the brakes hold, and the solenoid is just blocking back flow of fluid and pressure it should hold… not the case here.

 

[RAU03MACH]

I had a good one at one time
You push the break and push the lock button it would hold it
I can't remember but I think I removed the portioning valve
It's been a long time I used one


Mabe recheck the brake lines routing

 

[ttocs]

do you hear it or feel it click(if it is in your hand) when you flip the switch?

 

[Wells.Strength]

do you hear it or feel it click(if it is in your hand) when you flip the switch?

Yes, it is clicking.

 

[lwarrior1016]

You have it plumbed in to the front brakes, right?

Have you tried bleeding the brakes again, just to make sure there is no trapped air. Including the master cylinder.

Are you using stock rubber lines at the caliper?

 

[95opal]

Double check to make sure the in and out on the solenoid are going the correct way. Make sure you can actually here the valve close. Pump the brakes 4 or 5 times before engaging the line lock. Use organic pads not semi metallic. Use a brake line pressure gauge to ensure you arent bleeding off pressure. Not much to this its only a one way check valve.

 

[Wells.Strength]

You have it plumbed in to the front brakes, right?

Have you tried bleeding the brakes again, just to make sure there is no trapped air. Including the master cylinder.

Are you using stock rubber lines at the caliper?

Yessir, installed on the front lines and I have bled them with both installs. Brakes work great, line lock does not. That is the frustrating part, everything is installed correctly, brakes work properly, line lock is supposed to stop the back flow and it is not... I feel like I need two back to back solenoids lol. Either that or I am missing something very obvious, I even swapped lines around on the solenoid to see if i had them backwards... no change.

 

[lwarrior1016]

Yessir, I have bled them with both installs. Brakes work great, line lock does not. That is the frustrating part, everything is installed correctly, brakes work properly, line lock is supposed to stop the back flow and it is not... I feel like I need two back to back solenoids lol.

Well alright then. Just a dumb question, but when you push the brakes before the line lock engagement, are you standing on the pedal as if to push it through the floor?

 

[Wells.Strength]

Double check to make sure the in and out on the solenoid are going the correct way. Make sure you can actually here the valve close. Pump the brakes 4 or 5 times before engaging the line lock. Use organic pads not semi metallic. Use a brake line pressure gauge to ensure you arent bleeding off pressure. Not much to this its only a one way check valve.

That is exactly my train of thought... this is simple, why is it not working... The part that gets me is the brakes work great, just installed the cobra brakes up front made by power stop, and added a vacuum resevoir to help the brakes due to the cam. Still... line lock attempts to work when I pump it but will not hold even an Idle. I will check voltage later but I am 99% certain this is not the issue, it shares the same groud as my main harness, and it is fed directly from the battery terminal.

 

[95opal]

That is exactly my train of thought... this is simple, why is it not working... The part that gets me is the brakes work great, just installed the cobra brakes up front made by power stop, and added a vacuum resevoir to help the brakes due to the cam. Still... line lock attempts to work when I pump it but will not hold even an Idle. I will check voltage later but I am 99% certain this is not the issue, it shares the same groud as my main harness, and it is fed directly from the battery terminal.

I would get a pressure gauge on it to verify the solenoid is indeed working.

 

[Wells.Strength]

Well alright then. Just a dumb question, but when you push the brakes before the line lock engagement, are you standing on the pedal as if to push it through the floor?

Yessir, all the way to the floor or as hard as I can possibly push.

 

[Wells.Strength]

I would get a pressure gauge on it to verify the solenoid is indeed working.

I would bet the pressure gauge would show that it is not holding pressure, at least that is my guess otherwise it should be holding. My real question is why is it not holding, why did the previous solenoid not hold... maybe its just dumb luck.

 

[ttocs]

solenoids are fairly simple and reliable little devices but everything is known to fail and be bad out of the box. It could be as simple as some machining debris left inside like toyota is dealing with now with their motors they are replacing. Use some compressed air to blow it out, then activate it and see if it still allows air to pass. Maybe you clean it out, maybe you find out it is really bad

 

[Wells.Strength]

solenoids are fairly simple and reliable little devices but everything is known to fail and be bad out of the box. It could be as simple as some machining debris left inside like toyota is dealing with now with their motors they are replacing. Use some compressed air to blow it out, then activate it and see if it still allows air to pass. Maybe you clean it out, maybe you find out it is really bad

I agree with the possibility of it being bad out of the box, but the chances of two of them being bad out of the box back-to-back I would say are slim. That being said, I will consider anything and try anything.

 

[ttocs]

are you sure you have the +/- right? If they are backwards it might still click but it would kick it backwards instead of forwards to block the flow. you might try swapping the wires for shits n giggles to see if it changes.

 

[Wells.Strength]

are you sure you have the +/- right? If they are backwards it might still click but it would kick it backwards instead of forwards to block the flow. you might try swapping the wires for shits n giggles to see if it changes.

I swapped the lines last night thinking that I might get lucky and that be it, but not so lucky, no changes. I might just do the wire swap to see if it does anything.... at this point I want to plug it in to the damn wall! lol

 

[ttocs]

not the brake lines but the power wires?

 

[Wells.Strength]

not the brake lines but the power wires?

Right, I knew what you meant. I was just saying I swapped the lines as well. I will give swapping the wires a shot as well.

 

[RAU03MACH]

https://www.cjponyparts.com/resources/mustang-line-lock-install

 

[Wells.Strength]

https://www.cjponyparts.com/resources/mustang-line-lock-install

Man… that puts a twist on things… I don’t think my lines run like this but I’ll double check. Something tells me the car they used was a non abs car. Either way, thank you this may just be the tool I needed.