Hard brake pedal before car started
I have a 1988 325ic. The brake pedal is hard and the brakes do not work well before the car is started. The brakes work fine after the car is started, so I am thinking it might be related to a vacuum leak to the brake booster. Is there an obvious component that is bad, or a test I can do to isolate the problem?
Re: Hard brake pedal before car started
That behavior indicates a loss of vacuum in the brake booster while the car is parked. The cause could be a bad hose, bad check valve, or bad booster. Start with the hoses and check valve.Jim Levie, Huntsville, AL
do you mean started or do you mean moving?
if the car isn't started then the pedal should be hard, and the brakes shouldn't work well.