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Vacuum hose routing
#21
That's the same as the marked up diagram Kingb posted earlier, without the markup. I think it would be correct for a non-A/C car. If I omit the PVS off the water pump from this "circuit" and change the manifold source, it's a fit. But then... what's the point in the PVS? It's normally the high temp emergency control for the vacuum advance so I can see it making sense to omit.
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#22
I believe your problem may be in trying to match what was on the car when you acquired it. You don't know what the previous owner did to the car or what some smog check station said it needed to pass. Assuming the valve covers are the original ones, it appears that you need the 3-16A calibration and vacuum setup. I would do what you need to match that diagram and call it good.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#23
(12-08-2019, 02:52 PM)Don C Wrote: I believe your problem may be in trying to match what was on the car when you acquired it. You don't know what the previous owner did to the car or what some smog check station said it needed to pass. Assuming the valve covers are the original ones, it appears that you need the 3-16A calibration and vacuum setup. I would do what you need to match that diagram and call it good.

That's what I'm thinking. The 3 port could have been a fix for a broken 2 port and those were out of stock. If hooked up correctly, they will function the same. 

Looking back at the pics in this thread - you seem to have some pretty clear shots of most of your vacuum lines and it looks like a 16A calibration from what's visible. 

https://www.7173mustangs.com/thread-from-the-top-%E2%80%9873-q-code-convertible



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#24
(12-08-2019, 10:20 PM)Hemikiller Wrote:
(12-08-2019, 02:52 PM)Don C Wrote: I believe your problem may be in trying to match what was on the car when you acquired it. You don't know what the previous owner did to the car or what some smog check station said it needed to pass. Assuming the valve covers are the original ones, it appears that you need the 3-16A calibration and vacuum setup. I would do what you need to match that diagram and call it good.

That's what I'm thinking. The 3 port could have been a fix for a broken 2 port and those were out of stock. If hooked up correctly, they will function the same. 

Looking back at the pics in this thread - you seem to have some pretty clear shots of most of your vacuum lines and it looks like a 16A calibration from what's visible. 

https://www.7173mustangs.com/thread-from-the-top-%E2%80%9873-q-code-convertible


Well that's a whole new level of conundrum: the current 3-port valve is incorrect because it replaced a faulty 2-port.  If I could find a 16-A diagram for "with air conditioning" I'd be more confident in it.  But in 16-A, the valve in question is a temperature control valve and I can't quite tell where it's mounted, although it seems if were the water pump as the PVS is in 14-A, it would be positioned in the diagram differently.

AND, with the 16-A routing, supposing I went with a 2-port PVS valve mounted in the water pump, what is the 2-port TCV in the heater hose? Perhaps the TCV is related only to the emissions system?  No, I don't really expect an answer to that, but it sure would be nice to find the one magic diagram that explains it all.
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#25
Not all calibrations have different ones for with and without A.C. Some use the same calibration for both. It appears that applies to all 351C engines. I believe that you're looking for something that does not exist.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#26
It seems all cars used the TCVs, but only a/c equipped cars also use the PVS.

So if I go with 16-A — which uses a TCV, not a PVS, and the TCV is mounted in the heater hoses, what to do with the PVS mounted in the water pump? It must serve a purpose. That’s why I can’t quite accept 16-A as gospel.
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#27
Only the 250s and 302s have separate configurations for A.C. and non-A.C. engines. NONE of the 351Cs have separate configurations.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#28
You seem to be correct; I sit corrected. Nonetheless, still no idea what to do about the PVS vacuum circuit.

And as I look through the diagrams, only the 351c with 2-bbl and automatic seems (3-14a) to use the PVS, yet both VIN and the carb in the car are def 4-bbl. And only 3-14a shows the manifold vacuum source in about the same place as my car, but, 3-14a also shows before the vacuum advance an additional solenoid which my car doesn’t have.

The discovery continues (while I wait for other parts to arrive so I can get this put back together).
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#29
When David dismantled and detailed one of his cars for the Mustang Owner's Museum he took a lot of pictures of the process. You might look through his thread on it and see if you can find any engine pictures that show what you need
https://www.7173mustangs.com/thread-have...-73-mach-1

He has this one and some other unmolested cars with 351Cs and if you ask him there's a good chance he'll take some pictures of what you need. He probably already has them, but his computer crashed and he lost a lot of pictures, unless he has been able to recover them.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#30
Wow, thanks! What a great resource that whole post is. It will take some time to go through -- I only got through the first five pages. Hopefully there are more than just the first Mach 1; right off the top I see "15-A" and a two-port TCV, not PVS, in the water pump.
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