4A-GE Vacuum switch question.?

Ok, so I'm working an an 86 MR-2 with the 4A-GE engine. On the side of the intake manifold, right near the coolant reservoir, there is a vacuum switch or solenoid with a 2 prong connector attached to it. I cannot seem to sort out exactly what it is, which is not good because I need to replace it, the plastic end is sheered off and causing a vacuum leak. If someone who is familiar with these engines could help me out, I'd greatly appreciate it.