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1990 5.0 XLT, E40D
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49 Posts
Discussion Starter · #1 ·
Hi All, 1990 5.0 EFI. Looks like someone had removed my TAB valve completely and I am looking for the part. miesk5 has helped quite a bit already. I am hoping someone here can help me with photos of their 5.0 set up from the smog pump.

I am having some idle issues, more specifically idles fine after warm up in park (abo 700 rpm), then in drive (abo 900 rpm), but once i put it back to park the engine stays at abo 1400 rpm. i replaced the IAC (i still had the stock one 400k later) and am replacing all vacuum lines with the silicone lines suggested here Replace Plastic Vacuum Hoses with Rubber. This is where i noticed the missing TAB valve. Someone just capped the vacuum line. Once i fix the vacuum lines i will be following the troubleshooting check list here 1990 idle too high

Also does anyone know if the TAB valve and TAD valve are the same. I can't find anything for TAB only TAD. If anyone can link me to the right product I would appreciate it, i've spent hours searching with nothing.

Looks like the 5.0 set up is different than the 5.8. See images below.

5.8
165324


5.0
165325
 

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1996 bronco, 351w, E4od
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233 Posts
Hey i redid all my smog equipment from the ground up. Smog pump connects too the hose side of the second picture. Hope this helps a little bit i have more pics if you need any more. I dont have the TAD and TAB part numbers as they are not on the part itself but i have a spreadsheet of everything i purchased for this truck and its on there so ill need a minute.
165775
165776
 

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1996 bronco, 351w, E4od
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233 Posts
So there are two different valves these are the part numbers E7TE-9H465-AA and E7TE-9H465-BA. im not sure which is Tab and which is tad unfortunately. Hopefully someone can identify them.
165777
 

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1990 5.0 XLT, E40D
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49 Posts
Discussion Starter · #5 ·
awesome! Thank you. Looks like the TAB you have installed has the silencer built in it with no need to connect to the small silencer (small red silencer attached to the green line in my 5.0 image). Wasn't sure if that works or not. Those are definitely more available. Please keep me posted when you get it back up an running. For now I found what looks to be a similar TAB from an 84 Land Rover on ebay. it was 40 bucks so thought I'de give it a shot.

Per your second comment the first image with the yellow vacuum line is the TAD and the TAB is the second image.

Wish i could give credit, through my searches I don't remember who posted, but I added to my google drive a 1990 Ford Truck Emissions pdf that can help with more info.
 
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1996 bronco, 351w, E4od
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233 Posts
Where did you get the new vacuum lines?
I went to the junkyard and stole all the vacuum lines I could find. And you can get vaccum line fittings at any auto parts store. So if i was to make new lines id use this armormark 50210 vacuum line and some dorman vacuum fittings.
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I was hoping for the color coded ones... I broke all my hard lines yesterday. I guess I could go old school And buy a roll of vacuum hose... it would last longer, but won’t look as nice...
 

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1996 bronco, 351w, E4od
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233 Posts
I was hoping for the color coded ones... I broke all my hard lines yesterday. I guess I could go old school And buy a roll of vacuum hose... it would last longer, but won’t look as nice...
Yeah your best bet is the junk yard. But you could get some electrical tape in different colors and color code the ends of the vacuum lines.
 

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1990 5.0 XLT, E40D
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49 Posts
Discussion Starter · #9 ·
slimpartywagon, check out this thread Replace Plastic Vacuum Hoses with Rubber i used what Seattle did. you can probably purchase silicon lines via amazon for color coding. Just make sure you get thick walled for damage resistance.
 

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Yo Cali,
Ford used to provide a free, on-line Vehicle Emission Control Information (VECI) for 88 and up, PUK (49 States) Decal & PGP (Canada) Decal, Vacuum Diagrams & Calibration Parts List for 88 & UP until the bean counters pulled it.
Confirm following with local Ford dealership parts department; (need to know your Calibration number off of your PCM) or driver door jamb;
For example;
IN A 90 5.8;
165833

by member Seattle fSB
□■□
In a 93;
165832

by member rla2005
●○●

Think this applies to a 90 bronco 5.0:

VALVE ASSY, Thermactor Air By-Pass F5TE 9B289-CA F5TZ 9B289-C

SENSOR ASSY, Catalyst Exhaust Gas Oxygen Monitor- DOWNSTREAM F65F 9G444-CA F65Z 9G444-C

RESERVIOR ASSY, EGR Vacuum F4UE 9E453-CA F4UZ 9E453-C

CONTROL ASSY, EGR Vacuum Regulator FOTE 9J459-A1A FOTZ 9J459-A

SENSOR ASSY, EGR Pressure Valve F48E 9J460-BA, BB F4ZZ 9J460-B

VALVE ASSY, Thermactor Air Control Solenoid Vacuum E7TE 9H465-BA E7TZ 9H465-B

SENSOR ASSY, Exhaust Gas Oxygen - UPSTREAM F68F 9F472-AA F68Z 9F472-A

VALVE ASSY, EGR F27E 9D475-A2B, A4B F2TZ 9D475-A

TUBE ASSY, EGR Valve to Exhaust Manifold F6TE 9D477-ED, EE F6TZ 9D477-E

PUMP ASSY, Thermactor E5TE 9A486-DB E5TZ 9A486-D

VALVE ASSY, Thermactor Check - 3/4-14 Thread One End-Hose Nipple One End - UPSTREAM E9VZ 9A487-A

INJECTOR ASSY, Fuel F2TE 9F593-A3A F2TZ 9F593-A

VALVE ASSY, Throttle Air By-Pass F4TE 9F715-AA F4TZ 9F715-A

REGULATOR ASSY, Fuel Charging Pressure F4TE 9C968-BA F4TZ 9C968-B

POTENTIOMETER ASSY, Throttle Position Sensor F6TF 9B989-AA F6TZ 9B989-AA

DISTRIBUTOR ASSY F2TE 12127-AA F2TZ 12127-A

SENSOR ASSY, Mass Airflow F5UF 12B579-BA F5UZ 12B579-BA

SENSOR ASSY, Engine Electronic Control Coolant Temperature F5AF 12A648-AA F5AZ 12A648-A

PROCESSOR AND CALIBRATOR ASSY, Powertrain Control Module - EEC-V - TYPE: ML1-441 - REPROGRAMMABLE F6TF 12A650-TC F6TZ 12A650-TC

SENSOR ASSY, Air Charge Temperature
 

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1990 5.0 XLT, E40D
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49 Posts
Discussion Starter · #13 ·
Never gave an update, so fyi the TAB that i purchased from Ebay off an 86 Land Rover had similar part number to the bronco's. I installed it and seems to be working. No emissions codes.
 
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