I tried looking all around the web but never found the first pic that has this. On my motorcraft 2100 carb, there's a what looks like a small vacuum diaphram with a nipple for a hose to connect to, that sits right on the front of the Carb, outside the bowl, to the right of the filter and above the power valve.

What does this do and what hose connects to it?? Maybe a hose from the charcoal cannister?

 

I'm having trouble finding a specific answer. But I think I found a pic to help you along. You'll want to mention the model, engine, and options. I think the part is an idle speed motor for the A/C system. Bottom left corner of the picture.

 

It sounds like an old carb with an external power valve. Is there a standard Ford part number on the carb, or a tag on one of the float bowl screws? The number would start out something like C4TE, C4AE, etc. The first two digits are the year, C=60's, the second digit is the specific year, so C4 is 64.

 

No, the idle speed motor is on the side. As soon as you open the hood it's on the front of the carb bowl just to the right of the filter and above the power valve.

Yes it does have that tag on it. I'll get those today and post it.

 

It is the Temperature Compensated Pump (TCP) and the hose goes to the Vacuum Control Valve near the Thermostat Gooseneck.

A Temperature Compensated valve body will augment the accelerator pump system. The entire system is called the temperature compensated accelerated pump.

 

Cool. Quirky. When did they use those? I've never seen one before.

 

My 1983 has one.

 

Subford, I tried to give you rep for that post...... but it says I have too recently....

Great post!!!!

 

Yes, that's it. Would it be okay if it's not hooked up? Mine don't have anything going to it.

BTW, it has E3TE AVA on the tag and it's on an '83 F100.

 

Thanks anyway, I do not think that many pepole know how to do it as I have only recived about 23.

 

Yes, but your engine would be a little slow to respond when cold. What it does is restrict the amount of fuel that your accelerator pump can deliver when your engine is warm. When your engine warms up you get full vacuum on it and the fuel will be restricted (bypassed back to the fuel bowl) from the accelerator pump to your engine.

 

Let me make sure I got this right. It restricts the flow when it's warm and it has full vacuum. So when it's cold, it has little or no vacuum and not restricted meaning more fuel through the accelorator pump? Then why would it be slower to respond with more fuel when it's cold ? Now my head hurts!! :-)

 

Your right, it would run normal when cold but use a little extra fuel when warm.