I have pulled my motor out and done several repairs over the last 2 months. I have change my intake manifold to a Edelbrock 460 performer and changed the carburator to a Holley from the old motorcraft one. I need to find a vacuum diagram for the new manifold and carb. I don't know where they all go for the carb ports are in different locations. Also will I need to use the(ported thermal vacuum switch) or can I remove this and put in a plug.
I saw a couple of months ago someone offering vacuum diagrams.
Also I have to change to a electric choke. I need to find where I get the power for this. I think it comes from a orange wire at the solenode.
I should of took pictures of the truck with everything apart. Too late now.:7

 

I don't mess with Holleys anymore but the electric choke goes to the "Stator" terminal on your alternator.

 

Ok, you're probly gonna think I'm just a little dumb but what is a "stator" terminal on the alternator? My dad discovered on my 79 f100 302 that the previous owner had it connected to a ground wire and we were wondering the same thing. Where do you get the power for it? I didn't ever think to ask in here...(sighs)

Thanx!
Connie (only Ford luvr in the family!)

'79 f100 "Silver Ghost" (my baby)
'83 f100 "The Ford" (my first)
'85 f150 "Old Blue" (my next project)

 

Look at the back of the alternator. The stator terminal should be labeled "STA" or just "S". It is one of the small wires to the alternator. If all else fails you can connect it to another +12v wire that is hot in run. Ford just uses the stator connection since it is right on the engine and I believe the voltage characteristics are good for electric choke life.

 

Do you still use the EGR. I had been looking and talking to everone for a schematic. Got some really good help, but could not find the parts I needed to do it right. I did find a basic diagram in Chilton . It shows the use of an EGR, vac. port swich, EGR port at carb and the spark port at the carb.( this port pulls vac at throttle opening.) Like the EGR port. e-mail me and I'll send a rough draft of it to you. By the way this fixed my trans funky shift problem and that ellusive Ford lifter tap at highway cruise speed.


<rvaughnp@hisnet.org>

 

That lifter tap at cruising speed is called pinging...

One of the problems with vacuum controlled emissions is they are a pit of snakes and it is hard to know if anything is operating properly. Can you imagine working on a 72-74 car? Talk about a nightmare! You don't see any of those vehicles on the road anymore, -emissions killed them. If you have a working EGR leave it alone. It is hard to put one back on line tho. You need a working truck to get the whole system from.








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Are you using the EGR valve? What exactly do you need?. Here are the basics.

1) The Big port on the Holley, either on the pass. side rear or on the back of the carb(Depends on which Holley you have)
2) The tranny modulator valve and Power brake booster and HVAC controls(if you have A/C) go to the threaded in ports on the back of the intake. (Use the one out of the stock intake)
3) The distributor vacuum advance goes to the port on the pass side of the carb, just in front of the choke.
4) Put a cap over the one on the bottom front of the carb down by the intake.

5) The choke should be wired to the Stator wire of the alt. The easiest way to find it is to follow the wire off of the voltage regulator that goes to the S terminal. Splice into it and run your choke wire to there.

6) MAKE SURE THAT YOU INSTALL A GOOD INLINE FUEL FILTER!!! Holley's do not take kindly to any dirt getting into them. They will flood and give you all kinds of problems if they get dirt in them.
Jimmy

 

No My truck does not have a egr valve. At least now I have more knowledge as to where things go.
The Holley carb has vent ports on the front and back fuel bowls. The fuel bowls are located both on the back and front. My concern still is the 3 vacuum ports on the sensor that mounts on the intake manifold into the coolant crossover. Do I need this or can I just put a plug in.
I hope to have the truck up and running this week.
The main things is I now have more understanding of where to route the vacuum lines now.
If anyone wants to e-mail me a chart they may have you can send it to plyfury1@sk.sympatico.ca Thanks everyone.

 

You can just leave the ports on the vacuum tree open, or remove the whole thing and put a pipe plug in the threads. It will look better without that ugly thing sticking up anyway. You can look at my 77 in my gallery, I removed mine too.
Jimmy