hey all I'm kinda new to this forum so I apologize if this post isn't the best organized.
I recently purchased an '84 Eagle Wagon (it uses feedback carb, originated from Colorado, and its still located in a high elevation state), and decided that I should redo the vacuum lines because they are dry rotting and I thought it would be a good way to familiarize myself with the vacuum system on the eagle. However, when tearing out the lines I found out they have been ran quite differently than I was expecting, and I will need some help figuring out why the previous owner might have run the lines the way they did and what might be the best way to route the vacuum lines for this car going forward.
To bring any readers up to speed, I will go over the previous owner's modifications to the vacuum layout by groups of components:
PCV and vapor: The Vapor canister is not hooked up to the pcv valve nor is the pcv valve signal. The bottom port/vacuum line of the vapor canister doesn't run anywhere and I haven't been able to figure out where it would have run originally (the loose end is zip tied to the bottom of the radiator). The PCV valve itself runs direct to the vapor vent tube on the carb bypassing the vapor canister. The angled T-split for the ported purge line loops back in on its self. The only thing normal about the lines is that the PCV inlet still runs from the filtered air cleaner port.
(I don't have a ton of pictures for this group since this is where I started to tear down the vacuum lines so...) Pictures:
(https://live.staticflickr.com/65535/54926603568_99c8177032_b.jpg)
EGR system: The EGR valve is plugged??? it spits to two white tubes but is completely plugged by silicone. The EGR CTO also has 2 screws plugging lines. Naturally this means the distributor no longer shares a line with the EGR.
Pictures:
(https://live.staticflickr.com/65535/54925534627_775f72e943_b.jpg)
(https://live.staticflickr.com/65535/54925534577_b3c3859a61_b.jpg)
(https://live.staticflickr.com/65535/54926704065_289be545bf_b.jpg)
Air injection system: The aircleaner's upstream and dowstream air line ports have been plugged with silicone. The cat's down and upstream airlines are gone (down stream was completely removed, upstream died to rust).
Pictures:
(https://live.staticflickr.com/65535/54926704075_1c773a1a1a_b.jpg)
(https://live.staticflickr.com/65535/54925534612_beb6eb1216_z.jpg)
TAC system: They put a screw by the air cleaner door actuator mechanism so its always open???
Pictures:
(https://live.staticflickr.com/65535/54925534567_4342215bf6_b.jpg)
Some other quirks: The distributor runs directly to the carb. There is no solvac actuator on the carter venturi 2bbd feedback carburetor (8338). Nothing is connected to the 4" vacuum line and its not capped. From what Ive seen in diagrams this would normally provide the vacuum signal for the vapor canister and give ported vacuum to the carb? Also missing one of the thermal switches
Pictures:
(https://live.staticflickr.com/65535/54925534572_5fb6ecdae5_b.jpg)
(https://live.staticflickr.com/65535/54926649114_051acd6486_b.jpg)
(https://live.staticflickr.com/65535/54926704095_200de032e9_b.jpg)
This leaves me wondering, if there might have been a reason for the previous owner to modify these vacuum lines in this way. It almost seems as if the previous owner tried to de-smog the vehicle? Would it be worth it to try and restore this to some form of factory spec (maybe Canadian spec because all of the air injection is gone) or should I perform a ECM Test bypass and try to more properly remove the emissions components then re-tune?
Lots of helpful info here for diagrams and how to stuff if you haven't booked marked it yet https://amceaglesden.com/guide/Main_Page
Quote from: rmick on November 15, 2025, 10:16:11 PMLots of helpful info here for diagrams and how to stuff if you haven't booked marked it yet https://amceaglesden.com/guide/Main_Page
Thanks man!!! These have been really helpful at trying to figure out what the previous owner did. I'm still curious as to why they bypassed seemingly every vacuum controlled system? Most of the systems shouldn't be too bad to fix, (except for the pulse air, which I'm not looking forward to sourcing parts)