modulator valve hose routing?
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Senior User
Joined: Aug 2002
Posts: 184
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From: Chattanooga US
modulator valve hose routing?
My '73 EB w/302/AT has no vacuum lines running to the modulator. So as you can imagine, it doesn't shift very well by itself ( took it out on it's maiden voyage today). Can someone tell me where to land these two lines?
Thanks
Greg
Thanks
Greg
Tuned
Joined: Aug 2003
Posts: 363
Likes: 15
From: west central wisconsin
I just used steel brake line and bent it around to fit. Cut the brake fitting ends off. Then a small junk of rubber fuel line hose to connect to the factory vacum ends. Three years now and still works great.
Thread Starter
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Senior User
Joined: Aug 2002
Posts: 184
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From: Chattanooga US
Let me be more specific. My modulator has two vacuum fittings, one fore and one aft. What I need to know is which one is for manifold vacuum and which one goes to a ported switch..
Greg
Greg
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Joined: Apr 2004
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From: maui.HI
The outer nipple connects to manifold vac.. the inner nipple connects to port. I've
eliminated using the inner port vacuum hose when I switched to efi. I just left the port on the modulator open and had no shifting problems yet. I did this after seeing other C4 automatics with a single port vac. modulator. I'm really not sure what that second port is for? I've also noticed 2 ports on my old distributor vac. advance in which I eliminated the inner vac. line also.
eliminated using the inner port vacuum hose when I switched to efi. I just left the port on the modulator open and had no shifting problems yet. I did this after seeing other C4 automatics with a single port vac. modulator. I'm really not sure what that second port is for? I've also noticed 2 ports on my old distributor vac. advance in which I eliminated the inner vac. line also.
