http://www.ultimatesubaru.org/forum/attachment.php?attachmentid=4477&stc=1&d=1165871083

 

It's got 2 wires and 2 vacuum hoses, but one is broken off.

 

Do I have to replace it or can I just block it off?

 

'87 carbureted 3-door w/ EA82 engine

Runs terrible bow that the weather got colder.

It's got 2 wires and 2 vacuum hoses, but one is broken off.

 

It looks like an Evaporative Emissions solenoid. Controls when the fumes collected by the charcoal canister are sucked into the engine. [really simple version]

 

http://users.adelphia.net/~davidtief/solenoid.html

 

The link covers the EGR solenoid, but the same info applies to either.

 

Some guys disable them, I prefer to repair them as shown in the URL. In nearly 20 years, I never had to repair one a second time.