WAHOOO! This thread just saved me SO much work and stress!!

I have an 81 Bronco with a I6. I bought it in OR for registration in CA

I am in the process of rebuilding the emissions system...

THANK YOU FOR HAVING DONE THIS BEFORE!

 

That thread helped me sooo much !! Thank you a lot !!
I'm digging it again now because I've been able to rebuild the whole vacuum system but I still have some doubt about the check valves...
I wonder if they are oriented correctly on my truck. How do you read the check valve orientation from the diagram ?
I want to check that my TVV and V CK V are correct. From the diagram I would think it let pass the air from the little end to the big end ..? Like if there was a ball in it, it would clog the little hole but let pass from the little to the big...
But I feel I'm wrong and the flow goes from the big to the small (the white part to the darker part)...
Thank you for your help guys !

 

I know this is an old thread, so sad there is no more pictures in it, but even with out pictures it's a great help, I'm trying to find out which port is which on my carb.
Found bellow description on this thread but still I can not figure out which ones are in the actual carburetor.

----------------------------------------------------------------------------------------------
E = EGR Valve Port. This is correctly marked on the picture below.
S = Distributor Vacuum Advance. This is also correctly marked.
3 = Crowd #3. This is also correctly marked.
----------------------------------------------------------------------------------------------

 

see if these help you

Motorcraft 2150/2100 Carburetor Rebuild (5.1 MB PDF document)


Choke questions answered.

 

Ctubutis, that's for a diferent carb, mine is the carter yfa, the one been talked about it in this thread, I found another thread wich answer my question. Here:https://www.ford-trucks.com/forums/1...uestion-2.html


Post #22 says:
1: The "E" port on the carb looks like it's going to the Distributor in your picture. It needs to go to the Vacuum Control Valve (VCV) located at the front of the engine. It's in a tee that comes off the thermostat housing and a hose that leads to the heater core. Hook a line from the bottom port of the VCV to the "E" port of the carb.

2: The "S" port of the carb. The lowest one on the carb that looks blocked in your picture. This goes to your vacuum advance on your distributor.

3: With the second from the bottom line on your VCV, hook a line to it that goes to a vacuum tee. Then hook one line from the tee to your Wide Open Throttle (WOT) valve located on the drivers side of the carb, just below the air cleaner, bolted to the carb. It's a small white looking valve with a vacuum port on it threaded to a bracket attached to the carb. The carb throttle linkage has a flat cam that pushes the valve open when it's wide open. Connect the other side of the vacuum tee to the EGR valve.

4: The third port from the bottom of the VCV goes to a vacuum tee. One side of this tee goes to Port "3" on the carburetor the one that is located to the front under the fuel line. The other side of the tee goes to the Thermal Vacuum Switch, (TVS) located on the air cleaner. It's plastic and color coded with two vacuum fittings.