Stiff Brake Pedal When Parked More Than 8 Hrs.
#1
Instructor
Thread Starter
Stiff Brake Pedal When Parked More Than 1 Hr.
My brake pedal gets very stiff to the point I have to press kind of hard to start the car. This only happens if the car is parked for more than 1 hour. Started to happen about 2 weeks ago and hasn't gone away. I'm thinking brake booster or some kind of small vacuum leak? Any thoughts? The car just hit 150,000.
Last edited by WhatYaGot; 10-16-13 at 08:31 AM.
#4
Instructor
Thread Starter
If it would go down to the floor it would be the master cylinder. I'm thinking maybe the booster check valve is going bad and loosing vacuum over time when parked. Anyone else agree?
#5
I had the same issues and replaced by brake booster. Occasionally I still have the issue. I don't know, but it could be due to hot brake pads? I know when I brake a lot and then park, key off the car, come back, I have the stiff brake issue.
#6
Most definitely a leak somewhere. Check the hose that goes from the booster to the intake manifold, search for visible cracks on the hose as well as the check valve. I'd probably replace the hose and valve first and if that doesn't solve it then unfortunately you may be looking at a leaking booster. Doubt it's the master cylinder problem as that usually causes the brake pedal to drop to the floor.
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