The car doesn't run terribly bad without it connected but I'd like to know, Thanks!

There is a long story about that tube that involves a recall from General Motors. You can learn much more from the Archives...but here is a thread to get you started.

https://www.fiero.nl/forum/A...130314-2-115910.html

[This message has been edited by Gall757 (edited 11-25-2014).]

^^^ The only thing you have to worry about is the smaller tube below it that is attached to it. That smaller tube feeds into the EGR solenoid (it goes to the round part of the solenoid on the right side of the tube and IIRC the Evap canister on the left side of the tube). Otherwise GM just left the tube there as part of the PCV & intake recalls for the V6 cars early on and capped one end off, as it would have required them to modify the part to separate the EGR tube or make an entirely new part (which they already had to do to address the PCV issues).

There is also a rubber tube that would have feed into the intake canister. This wasn't changed out, as capping the end of the main tube resolved any problems. You can simply cap off the portion of the air canister the tube went to and it'll be ok.

Thanks a ton for the info! Glad that one of the many previous owners took care of some of the recall stuff. Sure does seem like there would be a vacuum leak there, though I can't feel anything when I put my finger on it while the car is running. Thanks again!

Neither of those tubes are connected to the Evap Canister. The small tube still connects to the underside of the air filter canister and the passenger end connects to the end of the EGR solenoid. You won't feel any vacuum there unless you ride in the engine bay while the car is traveling down the highway. The EGR solenoid isn't in operation except in certain conditions while driving at highway speeds, generally at times of deceleration.

I removed the whole assembly from the firewall and used a separate filter for the EGR solenoid. Plugged the open ports on the air cleaner canister. I found this worthwhile as it gives more room back there when changing plugs, replacing the exhaust manifold etc.

BR's,

Mark

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86 SE V6 4 speed
86 SE V6 Auto
2008 G6 GT "Street" Coupe
2005 Buick 3.6 Rendezvous
2001 Olds Silhouette (AKA The Band Van)