Brake Question
Thread Starter
Drifting
Joined: Apr 2006
Posts: 1,257
Likes: 7
From: Bluffton,SC
Brake Question
I have a question and thought someone might have run into this before. I had a hard brake pedal on my 1996 LT1. I tried to diagnose the problem thinking I possibly had a bad brake booster but was hoping for just a bad check valve. I read on here how to check it. I pumped the brakes about 5 times with the engine off and started the car with my foot on the brake and felt a little drop in the pedal.
I was happy about that so I moved on to the check valve. I pulled the vacuum line off and started the car and felt there was vacuum so I move on to the valve itself and pulled it out of the booster.
I did the blow and suck test and everything seemed OK here as well??
I decided to put it back together and give up for the day. I went to take a ride and the brakes were fine. What happened?
It healed itself? I had read that a stuck caliper might cause a hard pedal. Any thoughts? If it was a stuck calipers there a way to lubrications it?
Thanks for any help
I was happy about that so I moved on to the check valve. I pulled the vacuum line off and started the car and felt there was vacuum so I move on to the valve itself and pulled it out of the booster.
I did the blow and suck test and everything seemed OK here as well??
I decided to put it back together and give up for the day. I went to take a ride and the brakes were fine. What happened?
It healed itself? I had read that a stuck caliper might cause a hard pedal. Any thoughts? If it was a stuck calipers there a way to lubrications it?
Thanks for any help
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
If I had to guess, I'd say that taking your hoses off and doing the "blow/suck test" (insert inappropriate joke here) may have allowed the system to lose and regain presure and causing the check valve to loosen.
If your calipers were (mechanically) stuck the vacuum system has nothing to do with un sticking them. Possibly the pumping and pumping of the brake loosened them as well.
If your calipers were (mechanically) stuck the vacuum system has nothing to do with un sticking them. Possibly the pumping and pumping of the brake loosened them as well.
Thread Starter
Drifting
Joined: Apr 2006
Posts: 1,257
Likes: 7
From: Bluffton,SC
Do you think it would be a good idea to just change the check valve to be sure?
I am just trying to be preventative.
I realized when I was writing it that the blow/suck test just sounded wrong but how else could I say it?
At least I was not having problems with my DIC display.
I am just trying to be preventative.
I realized when I was writing it that the blow/suck test just sounded wrong but how else could I say it?
At least I was not having problems with my DIC display.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
Do you think it would be a good idea to just change the check valve to be sure?
I am just trying to be preventative.
I realized when I was writing it that the blow/suck test just sounded wrong but how else could I say it?
At least I was not having problems with my DIC display.
I am just trying to be preventative.
I realized when I was writing it that the blow/suck test just sounded wrong but how else could I say it?
At least I was not having problems with my DIC display.
