Brake problem. Any Ideas?
05-14-2011, 08:32 PM
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Car: 87 Firebird
Engine: 5.0
Transmission: 700 r4
Brake problem. Any Ideas?
When backing up, I've got to really press the brake pedal very hard to stop the car. Then when going forward, it's still hard for 2 or 3 presses, then goes back to normal.
05-15-2011, 01:29 AM
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Car: 92 T/A 'vert
Engine: Mild .040 over L98 4 bolt mains
Transmission: Mostly stock 700R4, 2600 Vigilante
Axle/Gears: LS1 3.42
Re: Brake problem. Any Ideas?
Sticky caliper/wheel cylinder?
05-16-2011, 03:34 PM
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Car: 87 Firebird
Engine: 5.0
Transmission: 700 r4
Re: Brake problem. Any Ideas?
Update: I've noticed that now it isn't just when backing up. It's any time I press the brake now. If I ease into it veeerrryyy slowly it's fine. If I press it normally while coming to a stop at a red light it's really hard and hisses at me.
05-16-2011, 04:16 PM
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Car: '91 1LE
Engine: 377 w/Stealthram
Transmission: T56
Axle/Gears: 3.42 Torsen
Re: Brake problem. Any Ideas?
You have a bad booster. Check the vacuum line and the check valve going to the intake manifold for leaks.
05-16-2011, 04:33 PM
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Car: 87 Firebird
Engine: 5.0
Transmission: 700 r4
Re: Brake problem. Any Ideas?
I think you're right. I just followed some steps from another site:
while the engine is off, press the brake pedal several times, hold 15 seconds. It should not move... pass
press brake pedal and turn engine on. If it sinks, booster works. If it doesn't move, booster is faulty... fail... pedal did not move.
while engine is on, press the brake pedal, then turn the engine off. If it doesn't move in 30 seconds, it's fine, if it rises, booster faulty... fail... pedal pressed up against my foot.
check valve test: disconnect line from booster, start engine and let it idle. hose should have a vacuum... pass
Looks like I'll be investing in a brake booster very soon.
Thank you for helping.
while the engine is off, press the brake pedal several times, hold 15 seconds. It should not move... pass
press brake pedal and turn engine on. If it sinks, booster works. If it doesn't move, booster is faulty... fail... pedal did not move.
while engine is on, press the brake pedal, then turn the engine off. If it doesn't move in 30 seconds, it's fine, if it rises, booster faulty... fail... pedal pressed up against my foot.
check valve test: disconnect line from booster, start engine and let it idle. hose should have a vacuum... pass
Looks like I'll be investing in a brake booster very soon.
Thank you for helping.
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