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1972 Eldorado Convertible, 97 Deville Concours, 93 Seville
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19 Posts
Discussion Starter #1
It sat for 35 years. All the hoses are so brittle that they crumble to the touch. I've been replacing them one at a time, but there are a bunch of dead ends. I've searched the forums, but don't seem to have any of the same pieces that I see come up in the diagrams. I've taken some pictures and drawn on them. Posted below. Mostly - right now the two that I cannot find a home for are the purple one coming from the front end - I don't know if it goes into the TEE on the choke or the thing next to the choke. Also, the big fat one coming from the cylinder in the back end - no place for that to plug in. I don't recognize any spots in the diagrams that come up in search. Please help???

She runs, but idles LOWWWW when I kick it into gear. Just finished the carb rebuild and tuning, new fuel filters, pumps, cleaned out gas lines, new filter from the gas tank. Distributor converted to electronic, timing seems right. I'm sure it's a vacuum prob. I just don't know hwere. Observe....

Busted hose from the Diverter Valve Assembly (thing under alternator)
2015-04-06 18.46.07.jpg


If there's anyone here that can point me in a better direction I'd sure appreciate it. I'm close. Just a few loose ends to tie up. I'm headed to the parts store to buy more vacuum hose now. There must be a whole stinking mile of it.


Once I'm confident it's running (close) to the way it should be I'm going to rip the whole thing out, document all things, and put it all back together.

Why? Because I'm a physical therapist and need more skills than putting people back together. And I live in Waynesville, Missouri now, and don't have anything better to do.

Any help is much appreciated.

A link to the a folder of un-graffiti'd pictures here:

https://www.dropbox.com/sh/gorjsgyvhzdq40p/AAACwX3e71BxAA0j23sAJDswa?dl=0


Thanks,

-d
 

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1970 Coupe De Ville//Cessna 172
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551 Posts
It looks like it has been messed with in the past. Problem is that you don't know how it is supposed to be so you can't trust what you have to work with. You need to find a diagram and run each new line individually.
Get everything run the way it should be and then try it. If you still have vac leaks, then you can plug each line individually to see where the leak is.
Jeff
 

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Registered
1972 Eldorado Convertible, 97 Deville Concours, 93 Seville
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19 Posts
Discussion Starter #3
It looks like it has been messed with in the past. Problem is that you don't know how it is supposed to be so you can't trust what you have to work with. You need to find a diagram and run each new line individually.
Get everything run the way it should be and then try it. If you still have vac leaks, then you can plug each line individually to see where the leak is.
Jeff
That's basically the problem. Yeah. No clear or compete diagram in the shop manual. One for auto climate control. But missing a lot of connections.

I will continue the search.
 

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1979 Coupe deVille, 1995 Sedan DeVille (sold)
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1,846 Posts
Is there a separate manual for vacuum and wiring? I know there is for 1979 Cadillacs. I have the Service manual for mine, but still need to get the vacuum/wiring manual.
 

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1971 Eldorado Conv
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15 Posts
I'm in the same boat here. I can figure out bits and pieces of the vacuum system from the shop manual but nothing putting the big picture together.
I can't believe there isn't a diagram somewhere.

Here's where I'm at in the process, everything rebuilt and getting dusty faster than I can finish it. If I figure things out I'll be sure to stop back and share.

 

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1971 Eldorado Conv
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15 Posts
By process of elimination I was able to figure out all the vacuum lines using the following diagrams and reading the shop manual.





The first pic is right from my shop manual for 1971.
The second is from the Cadillac-Lasalle club, unsure of years covered.
Last two from internet digging.
Hope this helps.
 
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