little module, pass side firewall w/ vac port

Edman1000

Registered User
Does anybody know what that little module on the passenger side firewall is? There is an electrical plug going into it and a vacuum hose port. My question is, the vac port looks like it's supposed to have a hose on it but it don't and it looks like it hasn't been on there for a while. Is this cool? if it needs a hose where the hell is it supposed to go. I remember seeing a chat on this before but never payed any attention to it. I think the module is the MAP sensor?????? Help?
 
It tells the engine computer what the current barametric pressure is. The engine computer needs that information to properly set the timing and fuel injector pulse width.
 
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