94 Brake problems
Thread Starter
Pro
Joined: Jun 2004
Posts: 520
Likes: 2
From: Mandeville, LA / Clemson, SC
94 Brake problems
Hey guys, I've been having some weird brake problems for about 5 mo. It all started when I was driving home one night hit the brakes hard and they went straight to the floor. I drove home with the emergency brake. The next morning I went to move the vette and the brakes worked. I still changed the master cyl. But when I did that I told my friend that I was changing the fluid so he cracked all the bleeders and pumped all the old fluid out. I bled the system on multiple occasions and I was still having problems. I brought it to the shop and had him bleed the brakes. Still a problem, so I changed the master cyl again with a brand new one from NAPA. Still not working. I called my mechanic back and he said the whole system needed to be power bled.
My question is, could it still be air trapped in the system or is the problem more serious. What is the proper way to bleed the ASR/ABS module? What does my mechanic mean by power bleed (does he mean use the handheld vacuum pump and suck the air and fluid out???)?
Thanks,
Jeff
My question is, could it still be air trapped in the system or is the problem more serious. What is the proper way to bleed the ASR/ABS module? What does my mechanic mean by power bleed (does he mean use the handheld vacuum pump and suck the air and fluid out???)?
Thanks,
Jeff
Intermediate
Joined: Mar 2005
Posts: 41
Likes: 0
Bleeding Problem
It definitley sounds like you needed the master cylinder. Did you bench bleed before installing? This help keep the air of the system. This is done by putting it in a vise and actuating the pludger with a screw driver to get out trapped air. Also make sure you are bleeding correctly. Close the valve before the pedal is release, open once pedal is pressed.
Melting Slicks
Joined: Jul 2000
Posts: 2,107
Likes: 14
From: Lancaster PA
You will probably need to pressure bleed the system. This works much better than the vacuum pump method. You will have to get a pressure bleeder device and attach it to the master cylinder and run as much fluid through the system as it takes to get the air out. There is also a bleeder on the ABS behind the drivers seat that may need bled as well.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Pressure bleed uses positive pressure, not a vacuum pump to fill the system. A phoenix tool will do the trick. Hook up to the calipers and force it back up to the master cylinder.
