Danny Richie

So I ordered this line lock kit: http://www.fastbirdperf.com/C6/C6LL.htm

The new lines were perfectly formed and it made for a very easy install.

I bled the brakes manually then went to a friends house that has a Tech 2 computer and we used it to go through the automated bled process that shuttered ABS values...

And after all of that the line lock will barely hold the car still at idle. If I just barely touch the throttle it pushes through the brakes and they don't hold at all.

So I added new brake pads and had the glaze surfaced off of the rotors.

And then I got the same results. It only holds at idle.

So I contacted Summit Racing. They make the solenoid that comes in the kit. I ordered another solenoid, installed it, bled the brakes again, and used the Tech 2 to do the automatic brake bled.

And it still does the same thing. It will only hold at idle.

Have a gotten two bad solenoids? What is up with this thing?

And I have a 3600 rmp stall converter. And if I hold down the brake peddle (locking front and back brakes) I can stall it up to 2,000 rpm's.

Any ideas are welcome.

Fuzzy Dice

I had to pump the brakes two or three times to bring up the pressure in the lines, then hold the pedal down hard, then press the line lock button , then release the brake pedal and do my burnout...I don't know how you are doing it...

road pilot

I agree this is the correct way to use a line loc--good luck

Joe_G

I do exactly the same, always give it a few pumps then hold and hit the button.

OP are you pumping it before you hit the button?

Danny Richie

I can pump it up and it helps a little. I can even pump it up after hitting the button and that helps a little too.

Still the brakes don't hold and it just rolls through.

The S-10 tube chassis car that I drive also uses a line lock. I hit the brakes once then hold the button down. It holds the brakes hard enough that the only way the car will move is to skid the front tires across the ground.

I am wondering if the anti-lock brake system is letting pressure bleed back through or if a reported by-pass value in the Summit solenoid is letting pressure bleed through.

I unplugged the fuss in the ABS system to shut it off, but that didn't help either.

Anyone ever install two solenoids with each one being after the anti-lock brake system?

Joe_G

Surely a dumb question but are you sure you installed it in the right brake line, which is the rear line from the master cylinder? At least that's the correct line on my 05...

One the solenoid is set you shouldn't be able to pump any more pressure in the system.

Danny Richie

Yep, I installed it on the rear line from the master cylinder.

And I have the in's and out's correct on the line lock.

Someone reported a by-pass value in this model that allows pressure to be added even after it is locked. I read it in a thread about the Summit solenoid, but I have not opened one up to confirm that.

Joe_G

Have you tried jacking up the front end, applying the line lock and seeing if both tires are locked?

Sounds to me like only one side is. I may be off base but I thought I read at some point the left and right sides are fed from different circuits, so the LF is linked to the RR circuit.

I might be wrong on this but have you ever checked to see that both are locked?

Danny Richie

I'll try to jack it up tomorrow and see if the problem is with both sides or not.

Thanks for brain storming with me. It is appreciated.

Joe_G

My pleasure Danny...I like trying to figure things out.

The line lock is usually so reliable, I'm a bit at a loss here.

Just to be clear your not skidding the tires through the lights are you? Sounds like you are rolling through but wanted to be sure.

Joe_G

What year is your car? I remembered a thread on problems a while back...here it is, doesn't sound like the same problem however.

https://www.corvetteforum.com/forums...r-be-easy.html

Danny Richie

The brakes won't lock up. They easily let the car roll forward. I can just barely touch the gas peddle and it rolls forward.

Mine is a 2006 with a Grand Sport body. We chatted in this thread last year.

https://www.corvetteforum.com/forums...d-tires-2.html

Joe_G

Ahh yes I thought your car looked familiar. And very nice I must say.

Your line lock should be working. Let's see what happens with the test if both fronts are locked...and meanwhile, maybe someone smarter than me will pipe up with a bright idea on this problem.

Did you call the vendor you bought it from to see what they say? Perhaps they have heard of this before.

Danny Richie

I called Summit about their solenoid. They have had some issues with them and thought it was the problem. That got me to trying a second one. Surely I didn't get two bad ones...

Joe_G

Given your symptoms, I think that is the most likely issue..these are simple devices..when they work!

Danny Richie

The tech at Summit says that my car is seeing the RMP rise and brake pressure high at the ABS but with the brake peddle not down and the computer is over riding it and opening the dump valve in the ABS.

It sounds like I am going to have to use a solenoid at each wheel to make this work properly. I have tried everything else. Maybe the tech is correct.

But it looks like everyone installs them before the anti-lock brakes and several kits come that way.

Still stumped....

Joe_G

That's not correct. I'm not an ABS expert but there are thousands of us with simple line locks on our Vettes with no problem and there's just no way this is true.

Silly question...you didn't install the solenoid backwards by mistake did you? I can't remember if it's directional, but, if it is, I think this would cause your problem.

Danny Richie

Yep, I know there are lots of them out there. The extremely helpful owner of Fastbird Performance has a lot of them out there as well. His kit was really nice too. All the lines were perfectly shaped and pretty easy to install.

I have triple and quadruple checked the in and out lines on the solenoid. But thanks for asking.

Joe_G

Any chance the sticker in/out was put on wrong?

I'm just stumped here like you but I'm not buying the need for a separate solenoid on each front line.

Danny Richie

I checked the instructions that came with the kit and the instructions from Summit on their solenoid. In's and out's are in agreement and correct.

I also just jacked up the car and checked each wheel. The line lock does lock the front brakes hard enough that I can't turn either wheel by hand.

And the line lock will hold the car up to about 1,200 rpm's then it pushes through the front brakes and the wheels are allowed to turn. Even on my slick garage floor the front tires do not skid across it when it pushes the car forward. It rolls through the brakes and turns the wheels.