Two of the four tercel wagons I work on will not idle with the "B" vacuum switch hooked up. I have disconnected the hose and plugged the port. If the car is idling and I connect the hose up, it causes the engine to die immediatly.
Both cars run fine and get 30 mpg plus. I have nothing to complain about I just have to know why?
Both cars had the engines replaced a year ago and i suppose something may not be hooked up right but i'm not seeing it.