Hi,

I will have to say that I too live in a no smog County of California.
It’s every two years if registered in pollution and population riddled counties.
This is only after it the car clears for smog upon buying it in state or from out of state and bringing it in.
It’s a one time thing only.

I would like to caution you a little bit about taking off smog equipment in California, if you may want to sell or title change the car as a gift I THINK it hits the wall in some manner?

If you go to sell the car to someone in the state of California, that person will have to have the car pass a smog test again in any county.
This was the or a “stickler”to whom will be responsible, the seller or the buyer? A lot of squabbling happened.
A compromise caused a rule change that as the vehicle progress upwards every year older, it was dropped from the smog requirement.
The Selling of vehicles became profitable again quickly in California.

With that said it’s not so much a problem, as other states and foreign countries come to the southwest for rust free cars. The state wants cars to go away to keep new car sales up!
It must be working as I see car haulers loaded up with both.
My 240s get to pass lots of cars when in the mountains, as they are on those trucks. 😊

Today if the vehicle cannot does not pass smog or if some or ALL of the equipment is not there then it becomes an issue of a dollar limitation set by the state to get it functioning.
Especially If the manufacturer no longer makes the parts then it “can go to arbitration” and get an exemption. I hear it’s a process though.
I”ll bet there is a fee of some sort built-in but I have never sold a vehicle.

I have bought a couple used from out of state and one in state. Everything was there and all passed.
If out of state, They check serial numbers along with the lights, brakes and safety functions or no title.

As far as the relay you are looking for it under the glove box on the firewall. Up just above the ECU and ICU Of the EKZ system. It is called a system relay that turns on fuel pumps and fuel system that includes the AMM. Most are a white cube relay possibly hanging from a loom above if ever investigated.
They are made as two separate units in one so one side can fail. Some blame bad solder joints but magnetic coils can become intermittent as well from heating up as they age.
The pumps can do it or corroded terminals. It’s worth inspecting.

A bad CPS can cause starting or unexplainable engine shut offs if aged.

The EGR controller valve has two lines to it. The YELLOW goes to the EGR valve port.
It’s the hose on top.
The white line is the intake port for vacuum source and is on the bottom of the valve. Do not reverse.
The portion of the controller valve keeps that white line cut off to the intake until energized, unless it’s stuck open?
But if the lines and the EGR diaphragm are intact, not leaking, it makes no difference to the manifold vacuum. The valve stays NC ….Normally Closed.

The valve applies vacuum but it opens the output line (yellow) and allows air into the EGR valve for it to close again.
This is where the problem can lie with EGR issues or the CEL for smog inspections. Maybe your ECU was a “late bloomer” with the California emissions changes because of the cars “build date.”
You should have a vacuum line diagram sticker out in front by the radiator. It should show vacuum routings.
They were really simple. Maybe too simple? 😊

Back on the fender valve there is a vent port under the gray plastic cap on top that get plugged up.
A foam rubber filter rots and particles get suck into the valve throwing a CEL from the lack of temperature change.
I change it out to a piece of polyester fill. It stays fixed for years at a time but dust is an enemy anytime and rotting foam was a bad choice in this instance.
If the valve got stuck or dirty, the car would have a slight problem with itself in idle mode.
An engine kept in a reasonable good tune usually burns cleanly thanks to the oxygen sensor.
Neglect has its ramifications!

I clean plastic valves or other things with denatured alcohol as a safe rinsing agent and cleaner towards most plastics. But it is poisonous if consumed and some states regulate it to some extent.
Nowadays that’s no surprise! 😵‍💫
Isopropyl alcohol or rubbing alcohol’s common name is mostly water within different volume amounts.
I think it is non poisonous and mostly cheap!
Water is considered a universal solvent and refrigerant but doesn’t burn? We are working on that! 🤔🤫

Then again, “one has to know one’s limitations.” Dirty Harry.

Thank for the feedback it helps dwell away an evening.

Phil