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I had the air filter off last week and I noticed what looked like a hose connection on some part. I looked in the FSM and parts catalog in the emissions sections and I didn't find what this part is. It sits near the EGR valve. I put my finger on it while the engine was running and it felt like there was suction. I didn't see any hose laying around disconnected.

Anyone have any idea what this is?

Fuel Pump 006.JPG Fuel Pump 007.JPG
 

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According to this diagram, from my AllData account, that LOOKS like it could be the VRV can purge solenoid, and it doesn't look like that port is supposed to have a line on it.

 

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Yes, I found a part number on it. 22522518 early fuel evaporation vacumn regulator is what I found on google. One arrow says manf for one hose and the other arrow points to the delay hose connection.

Good grief what engineer designed that mess.
 

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It's the VRV. Vacuum reducer valve. Reduces the vacuum from the manifold side off to the other side and helps smooth out the idle on the car. There's a ton of these primitive control valves starting in the late 1970s on automotive engines. The engineers were doing what they could before computer controls and full fuel injection were available.
 

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I found the exact same thing on my 88 brougham ....I coudnt find what was suppose to go there but figured it shoudnt be freely drawing air so I just put short piece of hose over it seal off ....didn't change anything...should I remove it
 
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