Hi, I own a 1991 Volvo 940se which has developed a problem with the brakes, when the car is turned of the break pedal is solid but when you start the engine the break pedal goes right down and sort of floppy.
The car was fine this morning.
Has anyone any idea could be wrong? I just hope it's not too expensive
Thanks Dave.

 

Do you have brake fluid in the bottle. Start there