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Author Topic: Need help with carb vacuum line?  (Read 940 times)

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Offline wilit

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Need help with carb vacuum line?
« on: May 01, 2018, 10:10:23 AM »
I'm trying to get my '79 California emissions Pinto ready for smog. In the process of doing the tuneup, I found a vacuum line on the carb that didn't have a hose attached to it. Any idea where this line connects to?


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Offline LongTimeFordMan

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Re: Need help with carb vacuum line?
« Reply #1 on: May 01, 2018, 11:35:16 AM »
Probably something to do with the automatic choke... probably to draw hot air thru the choke.

Check to see if there is a vacuum present at the port..

Does the car run ok without it? If so try putting a cap on it and see if it passes smog.

If not investigate farther.

I just moved from so cal and passing usually depends on whether you get a friendly tech. Just be polite and maybe talk about classic cars...

Also.. is the carb 5he factory one.. 5here are a lot of different models..

If the tech questions yiu about the plugged port.. tell him it was that way when you bought it.
Good luck

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Red 1973 pinto wagon DD, SoCal desert car, Factory 4 speed, 3.40 gears, Stock engine, 14" rims and tires, 60 K original miles

Offline wilit

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Re: Need help with carb vacuum line?
« Reply #2 on: May 01, 2018, 12:01:23 PM »
I think it's a timed/ported vacuum. It has a very slight draw at idle but seems to increase a little with RPM. And I'm pretty sure it's the original carb. It still has the factory tag on it.

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Offline nnn0wqk

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Re: Need help with carb vacuum line?
« Reply #3 on: May 02, 2018, 09:38:40 AM »
It is the port that goes to the dist vac advance on the 74's would think would be used as the same function on yours.
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