Main Menu

383 Vacuum Hose Diagram?

Started by CudaS0383, March 08, 2020, 09:18:33 AM

Previous topic Next topic

0 Members and 1 Guest are viewing this topic.

CudaS0383

 My 70 cuda came with factory air so am rebuilding the heater & A/C box in preparation for putting an aftermarket A/C system in.  When I removed the vacuum line from the A/C controller to the intake manifold behind the carb I realized there were a number of other vacuum lines that were not connected.  Does anyone have a complete diagram of all the vacuum lines for this car?  Thanks much!

Chryco Psycho

There should only be 4
- 1 to power brakes from intake manifold
- 1 to PCV from Carb base
- 1 to dist fron venturi vacuum on carb
- 1 to from the intake manifold to the AC controls in the dash , it goes through near the firewall AC lines
Do you have California emissions ?

CudaS0383

OK thanks for responding.  Sorry for my late response as I have been knee deep rebuilding my heater box.  This is not a CA car that I know of so no emissions other than what came with a '70.  Not sure I have a PCV.  There are also some lined under the air cleaner that aren't hooked up so do you know where they go (see picture)?


1 Wild R/T

You 100% should have a PCV... 

The hoses on the air cleaner go to vacuum pods that control doors... They should be tee'd together & attached to the nipple on the bottom of the air cleaner closest to that side... Then a second hose connects from the second nipple to a vacuum source on the rear of the carb near the base....


Chryco Psycho

I can see the PCV in your picture
left valve cover & curves around to the front of the carb base

CudaS0383

Thanks for all your help!  I looked in the service manual and they call it a "ventilator valve" which is why I didn't find a PVC valve initially when I looked.