There is this box under the hood of my 86 si and i have not idea what it is. my only guess is that it is some early from of emissions device but not sure what.

I apologize for my ignorance but i'm new to the whole DIY car thing and my only previous experience is my 240.

 

a crap ton of problems if one has a leak i know that i had an 86 si hatch and man i replaced almost every vacuum line in the car