quote Originally posted by reinhart: The reason there's some confusion on the unplugged tube running along the firewall, is there were two different designs. The early design the metal tube plugged into the intake snorkel. The later design plugged into the side of the air filter canister. During the recall, if memory serves, the early design snorkel was replaced with a new snorkel that had no inlet for that metal pipe. Thus the pipe was open on either end and didn't need to be capped.

I believe you're mistaken.

From what I understand, the now non-utilized metal tube on the firewall used to connect the filtered side of the air canister to the front valve cover of the 2.8 engine. This acted as the air intake for the PCV system. The problem is that under certain conditions, air flow temporarily goes the other way. There was a fear of oil collecting in this tube and eventually creating a fire hazard (due to the cat being located immediately below.) The recall eliminated the firewall tube from the equation, and instead, a shorter replacement metal tube is used to connect the front valve cover to a redesigned snorkel with an inlet just ahead of the throttle body. This allows any oil vapors (which are temporarily going the "wrong" way) to more easily be drawn directly into the intake system and burned in the cylinders.

Reinhart, if you have any links which contradict what I've stated, I'd honestly appreciate being corrected.

From earlier in this thread...

quote Originally posted by Patrick: At the dealership during recall repairs, this particular task was dealt with a couple of different ways (from what I've discovered on my own and other people's Fieros). The left side end of that tube connects to the filtered side of the air filter canister. In most recalls, it appears that the tube was left attached to the canister, and the right side end of the tube was capped. Sometimes though, it appears that the tube was disconnected at the canister, and the canister itself was plugged/capped. In this situation, then sure, the right side end of the tube could remain open, as the tube was no longer connected to anything. However, never assume that this is the method that has been utilized when you see an uncapped tube, because if the tube is still connected to the air filter canister, then filthy unfiltered air is being drawn directly into the intake system.

[This message has been edited by Patrick (edited 03-30-2021).]

quote Originally posted by reinhart: What's your explanation for the OP's post-recall picture with the metal firewall tube that dead ends at the snorkel?

It's not the best picture that the OP posted of that tube, but I already offered an explanation Here.

It is possible that the tube we're seeing is the end of the now unused firewall tube, but even so, that doesn't necessarily change anything I've stated in regards to what was modified for the recall. There would've originally been a rubber elbow attaching the firewall tube to the air filter canister.

Curly, can you please tell us where the other end of that tube goes?

quote Originally posted by Curlrup: What for and where?

[EDIT] Curiosity has gotten the best of me, and I've come across this diagram... supposedly of a pre-recall Fiero 2.8 PCV system. I have never ever (in 22 years of being here) seen a photo (rather than an illustration) of this type of setup where the firewall tube connects to the underside of the snorkel. Very strange. My '86 GT has the firewall tube (now capped on one end) connected to the filter canister. It was never at any time attached to a snorkel. It's nowhere near where the metal tube pictured above is located. Perhaps there were two different styles of pre-recall metal firewall tubes?

[This message has been edited by Patrick (edited 03-31-2021).]

quote Originally posted by Patrick: [EDIT] Curiosity has gotten the best of me, and I've come across this diagram... supposedly of a pre-recall Fiero 2.8 PCV system. I have never ever (in 22 years of being here) seen a photo (rather than an illustration) of this type of setup where the firewall tube connects to the underside of the snorkel. Very strange. My '86 GT has the firewall tube (now capped on one end) connected to the filter canister. It was never at any time attached to a snorkel. It's nowhere near where the metal tube pictured above is located. Perhaps there were two different styles of pre-recall metal firewall tubes?

I can't get a good angle to get a good photo. However, the two hardlines I speak of are actually ONE tube. It runs along the firewall, behind the air cleaner, then makes a sharp bend around the air cleaner can and comes out the other side. So the two photos I posts were just the two ends of the same tube. Nothing is connected to the air cleaner or snorkle. So exactly like the illustration shows.

[This message has been edited by Curlrup (edited 03-31-2021).]

[This message has been edited by Curlrup (edited 04-01-2021).]