Air Canister Missing Parts (Page 1/2)
Wacko1Jacko12 APR 23, 12:37 PM
Hi everyone,

I have a 1988 Fiero Formula V6 2.8L, I am trying to put everything back together, the previous owner took out a lot of items. I ordered an air canister (along with its bracket/ lid). I soldered back the MAT sensor as well since he cut it for some reason. There is a tube that connects to the air canister, I am not sure where it leads since it was taken out. This tube was mounted to the engine bay wall. Where does this lead to?

What is highlighted in red in the image is what I am missing:


My Engine Bay:
Patrick APR 23, 01:27 PM

quote
Originally posted by Wacko1Jacko12:

There is a tube that connects to the air canister, I am not sure where it leads since it was taken out. This tube was mounted to the engine bay wall. Where does this lead to?



As of a recall decades ago, that tube is no longer used. Make sure to plug the hole for it in the air filter canister. However, there was also a smaller tube running along the firewall that supplied air from below the air filter canister to the EGR valve solenoid. I can't tell for sure from your image whether it's still there or not. I suspect it's not. You can see it in your first image.

[This message has been edited by Patrick (edited 04-23-2024).]

1985 Fiero GT APR 23, 02:08 PM
Yes that big tube is nothing to miss, interestingly enough, my air filter canister doesn't have a hole for that tube, it isn't just plugged, it just doesn't have the hole.
Vintage-Nut APR 23, 02:38 PM
Read this thread:

90 Fiero Recall: '85-'88 2.8L V6 (RPO L44) GM Campaign 88-C-24 w/ Part Illustrations
https://www.fiero.nl/forum/Forum2/HTML/147137.html

BTW - The PFF 'Search' function is your best source.......

------------------
Original Owner of a Silver '88 GT
Under 'Production Refurbishment' @ 136k Miles

Patrick APR 23, 02:39 PM

quote
Originally posted by 1985 Fiero GT:

...interestingly enough, my air filter canister doesn't have a hole for that tube, it isn't just plugged, it just doesn't have the hole.



Yes, that is interesting. I never knew that these air filter canisters were ever manufactured without the hole. I forget what year the recall was made, but if it was after '88 (see above, it was '90), I would suspect then that any canister without the hole was a replacement canister and not the original.

[This message has been edited by Patrick (edited 04-23-2024).]

82-T/A [At Work] APR 23, 04:11 PM

quote
Originally posted by Patrick:

Yes, that is interesting. I never knew that these air filter canisters were ever manufactured without the hole. I forget what year the recall was made, but if it was after '88 (see above, it was '90), I would suspect then that any canister without the hole was a replacement canister and not the original.




There were several GM cars that used a nearly-similar air cleaner / canister as the V6 Fiero. Pretty much a bunch of V6/60 engines in early MPFI cars like the Cutlass Sierra, or Grand Am, or whatever. There was even a car, maybe it was the Baretta GT (?), but it had a special air canister lid that fits the Fiero's V6 canister, but the center of the lid is totally open, allowing additional air in. It has three thick bars that span across holding a cyl that goes around the long dowel where you attach the hold-down nut. I'll have to take a picture, but it's pretty cool. It even has a small "cap" that goes over the top to prevent rain from getting in. I don't remember the application, but I guess it was to provide air in addition to where it would come in from the other way. It was part of some kind of vacuum operated system where if you floored it or whatever, it would open this other door (in the hood) and allow air in through the top as well.

I guess kind of pointless as it would allow hot air from the engine vent into the engine... but maybe at speed there wouldn't be as much hot air in there?
Wacko1Jacko12 APR 23, 07:05 PM

quote
Originally posted by Patrick:

As of a recall decades ago, that tube is no longer used. Make sure to plug the hole for it in the air filter canister. However, there was also a smaller tube running along the firewall that supplied air from below the air filter canister to the EGR valve solenoid. I can't tell for sure from your image whether it's still there or not. I suspect it's not. You can see it in your first image.




Thank you will do! The previous first image was from a YouTube video I was referencing, the second image is my vehicle. I believe the owner before me did a egr delete, plus he deleted the solenoid for it, that would explain the smaller tube missing. This might lead to a second topic, would I need to worry about this egr/solenoid delete I had my engine tuned by a shop with this stuff off as well with having a poor/cheap ebay air intake because the original was missing.





Patrick APR 23, 07:52 PM

quote
Originally posted by Wacko1Jacko12:

...would I need to worry about this egr/solenoid delete I had my engine tuned by a shop with this stuff off



That would depend on what was "tuned". Did they actually burn a new PROM with the EGR deleted?
Wacko1Jacko12 APR 23, 08:06 PM

quote
Originally posted by Patrick:

That would depend on what was "tuned". Did they actually burn a new PROM with the EGR deleted?



They did not burn a new PROM, would it be easier to put the EGR and its solenoid back in?
Patrick APR 23, 08:20 PM

quote
Originally posted by Wacko1Jacko12:

They did not burn a new PROM, would it be easier to put the EGR and its solenoid back in?



"Easier"? That's doubtful. I'm a believer in having a properly functioning EGR system... but considering what you've currently got there, I'd think getting an EGR delete PROM burned would be a whole lot simpler for you. If that's the route you decide to go, there are members here who offer the service.