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- - Vacuum line help (https://67-72chevytrucks.com/vboard/showthread.php?t=416576)

lo72	08-14-2010 03:18 PM

Vacuum line help

Can anyone give me a quick lesson on where and how the vacuum line run to get vacuum into the cab and up to the a/c and where they attach. The PO on my 85 seems to have had 2 hobbies. 1 cutting wires and 2 pulling vacuum lines. Any help would be great...thanks greg

PRattenbury

08-15-2010 09:24 AM

Re: Vacuum line help

The vacuum feed came off the intake and went through the firewall to the heat/AC controller. But from there they go to all the dampers in the duct work and kick panels. Best thing to do would be to find a schematic diagram for them. Unless you know someone that has a truck the same as yours you could use as a go-be.

lo72	08-15-2010 01:48 PM

Re: Vacuum line help

Thanks, i may try to google it greg

motornut

08-16-2010 10:13 PM

Re: Vacuum line help

2 Attachment(s)

i think i got a pic

lo72	08-17-2010 07:01 AM

Re: Vacuum line help

thanks man every little bit helps...

motornut

08-19-2010 05:30 PM

Re: Vacuum line help

3 Attachment(s)

these are ones i have now ,will check but it looks like it goes to the vapour can,and i think it's the same line coming in over the heater box

lo72	08-19-2010 05:45 PM

Re: Vacuum line help

thanks these will help alot

motornut

08-19-2010 10:46 PM

Re: Vacuum line help

quick question is it tbi?

82chevy350

08-19-2010 11:13 PM

Re: Vacuum line help

Looks Like It

lo72	08-20-2010 05:27 AM

Re: Vacuum line help

No it is a carb thanks again

motornut

08-20-2010 06:49 AM

Re: Vacuum line help

dam hoped it was tbi,seems my truck shouldn't be

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