Quote:
Originally Posted by sixto
An indicator light will tell you if a line breaks while the motor churns away. I suppose a stiff brake pedal tells you the same thing 
Someone should take advantage of Pelican's marque breadth to see if mechanical pumps are replaced more frequently than electric pumps. |
I was thinking more along the lines of a vacuum leak in one of the non-brake vacuum lines... like a vacuum pod in the climate control system or in the locking system. Under steady-state driving (no braking, no shifting, no unlocking) an electrical vacuum pump should rarely come on. The designed leak at the VCV for the transmission would be a loss that would require periodically bumping the pump to restore full vacuum. However if there were a leak elsewhere it would come on a bit more frequently to replenish the vacuum that was lost through the leaks. In these situations you wouldn't get a hard brake pedal because the check valve would keep good vacuum in the booster.