The brake stiffening up is normal. There is a vacuum reservoir that holds a very limited volume of vacuum to assist with the brakes when the engine is not generating a vacuum (wide open throttle, not running....). It allows a limited number of brake applications before being exhausted, which is one of the reasons to not shut off an engine if the throttle is jammed (use neutral) Try applying the power assisted brakes in any car with the engine off and you will find that after a couple applications the brake is much stiffer though fully functional.
If the problem is associated with the brakes it is likely the switch isn't adjusted correctly and the brakes pedal needs to be pressed too far before the car starts.
If the problem is associated with the brakes it is likely the switch isn't adjusted correctly and the brakes pedal needs to be pressed too far before the car starts.
Last edited: