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Old 07-26-2010, 08:38 PM   #3
Active Member
Join Date: Feb 2008
Location: Los Angles CA
Posts: 136
Re: Brake pedal travel

Long pedal travel can come from:
air in the system
wrong pedal ratio
too small bore master cylinder
booster push rod adjustment (booster to master cylinder)
pedal rod adjustment (brake pedal to booster)
misaligned caliper
brake shoe adjustment (within the drum)
wheel bearing adjustment (disc brake)
C-clip axle end play (disc brake)
parking brake adjustment (disc brake)
flexing firewall when brake is applied

The pedal drops more when the engine is running because the booster is working to boost the hydraulic pressure. As the pressure increases the pedal will usually go lower.

Danny Nix
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