I'm in the same boat as you with my '90 351w. I could be wrong but I don't think new ones are available. Mine is functional but has that annoying rattle. I also haven't tested which valve is the problem in the system. Might be gutting an AIR system this weekend at pick n pull, I'll keep you in mind.
-Matt

 

I get some variation in idle. Also it surges sometimes. Guess Ill look at a used place.

Yo Peter,
Sorry about not seeing that!
So many sources of parts have back logs due to COVID
Call Tomco
TO PLACE AN ORDER, CALL:
314-646-5353 OR 800-325-9972

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Oh, no problem. I saw several sites-one being Autozone- that said they had it but you could only order in store. So I go to my local store and they tell me it's not available at all. If you know somewhere else to look please advise.

 

Yo Guys,
Check at rockauto

 

I checked them and others. note the Out of Stock message. They don't have them and don't know when they can get them.

 

Yo Peter,
Sorry about not seeing that!
So many sources of parts have back logs due to COVID
Call Tomco
TO PLACE AN ORDER, CALL:
314-646-5353 OR 800-325-9972

Untitled Document

excerpt;

 

Yo,
For a YARD SEARCH on-line, I use;
Hollander Quality Replacement Parts | Find Used Auto Parts | Online Locator
A yard that uses Hollander Interchange can search other yards and have it shipped including some Canadian yards.
"...For over eighty years, Hollander has been making the best tool for fast, interchangeable part matches. The new Edition Hollander Interchange contains more interchangeable options than ever before.
The Hollander Interchange provides auto recyclers and auto collectors, rebuilders, and others with the easiest and most comprehensive solution for identifying interchangeable auto parts..." See their yard Directory @ Seller Directory | Used Auto Parts | Hollanderparts
Can select a certain part.
If a specific part isn't listed, search again for the next higher assembly, such as in this instance, select: 1990 >Ford > Bronco > Engine Accessories > Air Injection Pump > 00326 8 351W (5.8L)
One result for example;

¤
or
Car-Part.com--Used Auto Parts Market
Can select certain parts
Can search by year range, such as 92 through 96 & has best item condition descriptions such as "COVER BAD LEATHER PWR BKT GRY"
Has Vehicle Pics for some vehicles incl. interior/dash, back seat, front & rear and engine bay
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Bronco Used Part Search @ Ford Bronco Parts | Used Auto Parts with source, cost, yard and phone #

¤
Concord Spare Parts @ Spare parts for your cars, trucks and special vehicles
732-374-3872
adv@concord-parts.com

¤
Home | Pick-n-Pull
This is a Company name w/yard locations in various states
Can NOT Select certain parts
Has Vehicle Pics for some vehicles
¤

B&R Autowrecking, in CA, WA, NV, OR. "We have a fleet of over 60 trucks that deliver to business addresses all over Oregon and Washington. Outside of Oregon and Washington, we have daily shipping services. Contact Us for a quote."
"Will ship to their closest yard for $50 flat" by StemCellResearch", 2019
¤

Row52
Can NOT Select certain parts
Has Vehicle Pics for some vehicles
AND Want a Part? It's Easy...
1. You create a Parts Wanted Listing.
2. Parts Pullers respond with offers.
3. You pick the best one.
A Parts Puller gets the parts you need.
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For obsolete parts by Ford long version pn:
Welcome to the PartsVoice Parts Locator
Rear Counter Auto Parts Locator
Main
Home - NOS Parts

And by a search function;
Truck Ford

For new discounted Ford parts:
Galpin Ford (suggested by JScatt!)
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Call Ray @ Henrys Parts Depot 714-997-8895 He knows me.

Stop by a local Ford dealer parts department and ask about parts interchange They will look it up in the Interchange Guide data base.
The Ford bean counters deleted the public Interchange Guide and Buyer's Guide a few years ago to save their $ & make it more difficult for us to maintain our Broncos.
As an example, here is Ford Motorcraft's buyers guide info for a ""Motorcraft basic pn":
"12A646 is a relay.EEC power, mostly found under the hood next to the fuel pump relay on EFI vehicles. .
RELAY, ELECTRONIC ENGINE CONTROL (ASSEMB
DY-865 [Universal Relay] 2 Bbl.; E1VB-12A646AA,E3AF-12A646B1A,E3UF-12A6461A1,A2A, B1A,,B2A,E3TF-12A646A1A,A2A,B1A,B2A
and from the Buyers Guide:
Part No.: DY-865
Manufacturer: MOTORCRAFT
Part Type: ELEC ENG CONT ASSY RELAY
Total No. of Vehicles: 275
FORD (202) 1983-1994
AEROSTAR (9) 1986-1992, 1992 V6-183ci 3.0L F/I Vin U, 1991 V6-183ci 3.0L F/I Vin U , 1990 V6-183ci 3.0L F/I Vin U
Etc.

BRONCO (18) 1983-1991
1991 V8-302ci 5.0L F/I Vin N
1991 V8-351ci 5.8L F/I Vin H
1990 V8-302ci 5.0L F/I Vin N
1990 V8-351ci 5.8L F/I Vin H
1989 V8-302ci 5.0L F/I Vin N
1989 V8-351ci 5.8L F/I Vin H
1988 V8-302ci 5.0L F/I Vin N
1988 V8-351ci 5.8L F/I Vin H
1987 V8-302ci 5.0L F/I Vin N
1987 V8-351ci 5.8L 4 BBL Vin H
1986 V8-302ci 5.0L F/I Vin N
1986 V8-351ci 5.8L 4 BBL Vin H
1985 V8-302ci 5.0L F/I Vin N
1984 V8-302ci 5.0L 2 BBL Vin F
1984 V8-351ci 5.8L 2 BBL Vin G
1984 V8-351ci 5.8L 4 BBL Vin H
1983 V8-302ci 5.0L 2 BBL Vin F
1983 V8-351ci 5.8L 2 BBL Vin G
ETC."
¤
Pull-A-Part SEARCH INTERCHANGEABLE PARTS INVENTORY, @ SEARCH INTERCHANGEABLE PARTS INVENTORY

 

Well, I have a possible solution?

Is it possible to bypass the valve altogether? I re-registered my Bronco here in Arizona as a classic vehicle, so I don't need to worry about passing emissions.

Have any of you tried bypassing? It should be doable?

 

Yo Peter,
Removal; "...What you need to do is electrically plug in the TAB and TAD solenoids but remove the vacuum lines, then all the air injection plumbing and valves can be removed and the heads plugged. The EGR is a seperate system from the Thermactor and the computer treats it very differently, it also helps increase mileage and power so it's a good idea to keep it anyway.
If you have the 96 DPFE system there is no way to bypass it without the computer knowing and throwing a code so you may as well keep it intact. you'll get codes if you remove the solenoids, the easiest way to avoid this is to just leave them plugged in. The TAB and TAD you could fake out pretty easy, but even the old EGR system can't be faked because the computer both commands valve movement and watches for feedback to confirm it happened, so a dummy resistor won't cut it."

 

Yo,
This didn't make my reply ;
A neat mod by jrichker; "...Put the resistor inside the heat shrink tubing and crimp the connectors on. I would choose the Ford pin connectors since they should plug in the TAB & TAD wiring. That way you haven't modified the wiring so it is easy to re-install the TAB & TAD solenoids if emissions testing comes to your area. 18 gauge crimp on taps..."
read more and see many pics.
at Are the TAD/TAB vacuum solenoids NEEDED?
¤
EGR Eliminator Installation Manual by Ryan M. @ Wayback Machine

¤
EGR Do it yourself MIL Eliminator by TrimDip @ Ford Mustang Forums

miesk5 Note, see EVP pins by SeattleFSB @ EGR Valve Position (EVP) Sensor Testing & Replacement

"And, I did find this, "here's an even easier way; once the EGR valve is removed off the car, remove 3 small (7mm?) screws to disassemble the pintle assembly (EVP) from the EGR valve body. plug the EVP back into the wiring harness and push the steel pintle in about halfway and using strong tape (green or red duct tape works best), wrap the tape over the pintle so that it holds its halfway-in position. hide the pintle assembly out of sight. I've run my car like this for at least 5 months now and no check engine light. No soldering needed, no money spent except if you need to buy tape and its still safe and reliable. just remember to put an EGR delete plate over the opening in the upper intake, a cap over the heater tube opening on the passenger side header and plug off your 2 or 3 (now disconnected) vacuum lines." by cobraman1024 @ Ford Mustang Forums

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EGR Location & Block-Off Plate pic in an 89 @ https://www.supermotors.net/getfile/439467/fullsize/dsc02766.jpg
Source: by Tim C (TnTbronco2, Trail Truck, Street Truck, Crazed, Broke, OoG)
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Here is Ryan M's now closed parts site @ RJM Injection Tech ? Welcome
Ryan also sold;
Actuator Eliminator Resistor $2.00 each
75 ohm 3watt Resistors can also be used to eliminate the EVR, CANP, TAB & TAD solenoids.
¤

 

Excellent! Thanks for the guidance. This issue has been making me crazy.

 

So here is what I did. Since you no longer can get a diverter valve, and it is needed to pass emission tests where I live, it donned on me that since my Bronco is 30 years old, I can register it as a classic vehicle. Once I did that I could simply bypass the valve. Problem solved. Thanks for all your help folks!