How deleted are we talking? just pulling the pump, or pulling all the hosing back to the exhaust pipe?
Just pulling the pump - nothing required.
Gut everything, there is a solenoid in that line that needs to be accounted for, but if it was off and the tubing was wide open, you would surely hear a sizeable exhaust leak.
Get a can of carb cleaner and spray around hose ends, any source of vacuum.
When a vacuum leak grabs the carb cleaner and sucks it in the rpms go up.