I have a 2010 MCS as many of you know already. I noticed that first thing in the morning when put my foot on the brake to start it, the brake barely goes down. Stiff. The car starts. Through out the day when starting I can actually press the brake pedal.

Is this normal on a cold start, the brake pedal is stiff?

Thanks everyone for all the previous help.

 

yup...on ANY power brake car, once the stored vacuum in the booster has leaked off...the pedal will be stiff. on a warm start, the residual vacuum is still there.