Hydroboost brake warning light comes on
Thread Starter
Drifting
Joined: Oct 2005
Posts: 1,331
Likes: 479
From: Appleton Wisconsin
Hydroboost brake warning light comes on
I put in a new hydroboost system in and have power bled my brakes 3 times. The brakes work good but if you push the pedal hard the brake light comes on which would mean that the fluid must be moving the switch on the proportioning valve. Anyone have any ideas should I try gravity bleeding?
Safety Car
Joined: Nov 2008
Posts: 3,720
Likes: 557
From: Seattle Washington
I put in a new hydroboost system in and have power bled my brakes 3 times. The brakes work good but if you push the pedal hard the brake light comes on which would mean that the fluid must be moving the switch on the proportioning valve. Anyone have any ideas should I try gravity bleeding?
Burning Brakes
Joined: Mar 2012
Posts: 871
Likes: 73
From: Memphis Tennessee
There is no level sensor in a C3 master cylinder resevoir. It does sound like you still have air in the system. Is the pedal firm?
Safety Car
Joined: Oct 2005
Posts: 3,570
Likes: 1
From: Algonac Michigan
The only problem I had bleeding my brakes was that I seemed to have a small bubble of air in each caliper that was purged only after I tapped each caliper with a hammer to get the bubble to the top. Also make sure to bleed them in the correct sequence.
Good Luck!
Good Luck!
Thread Starter
Drifting
Joined: Oct 2005
Posts: 1,331
Likes: 479
From: Appleton Wisconsin
No, It still is sponge I think I will try gravity bleeding, also I put 6 piston Wilwoods on the front. I'm going to check where the bleeder comes out on the caliper maybe I need to raise the front end of the car more than the back to make sure the bleeder is the at the high point of the caliper.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Hydroboost brakes act funny until everything gets settled in properly. Make sure your power steering fluid is up and not foaming. If you can stop the car when going real slow then what I did was drive it around the block a few times real slow and stepping on the brake pedal every so often and eventually they start to work properly and will be hard a rock 
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