[Old Bear]

Can we do a sanity check?
This 5th Gen may have had air shocks at one time. Is this correct?

It appears that it now has black air bags.
Those are normally good and worth keeping.
Normally we see red Air Lift 1000 air bags that get put inside the rear springs and the air shocks replaced with shocks.

There should be a way to fill the air bags for when you carry a heavier load.
Ideally each bag is filled with a separate fill valve, yet some installed with just one valve.

Can you find the valves and lines that fill your black air bags?

 

[Old Bear]

May I ask that you consider adding your vehicle info, so that it appears under your avatar.
This will help others help you.
Click this link, locate vehicle info and then fill in an abbreviated info like 1984 305ci, TH2004r
After typing it in, you can set the permissions so it can be seen by Members or Everyone. You choose.
Do not forget to scroll down and select SAVE
(2) Account details | El Camino Central Forum

 

[Old Bear]

Can you tell us which air suspension you added?

Keep in mind that there may also be some tubing running from the fuel tank forward to the charcoal box to help with reclaiming fuel vapors.