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Heater Control vaccum
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aaron_sK
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Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Fri Jan 21, 2011 12:10 am    Post subject: Reply with quote

Heater valve ditch is a good idea. However he still needs to tap vacuum to run the doors under his dash. Otherwise he'll have nothing other than defrost. Women tend not to appreciate things like that. Razz

iansane wrote:
Is that how nonAC cars run it? My vacuum lines came through the firewall right below the heater core tubes (ish).


Separate grommet? I could have sworn the one in my IROC and the one in my Z were in the harness itself.
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91camaro_rs
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Joined: 03 Dec 2008
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Location: Fox Island, Wa

1991 Chevrolet Camaro RS

PostPosted: Fri Jan 21, 2011 8:25 am    Post subject: Reply with quote

aaron_sK wrote:
Women tend not to appreciate things like that. Razz


i can totally agree with you there, my "friend" loves the heater in my camaro mainly cause it gets up to temp in like 2 minutes

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iansane
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Joined: 16 Jan 2004
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Location: Bothell

1991 Pontiac Trans Am

PostPosted: Fri Jan 21, 2011 8:48 am    Post subject: Reply with quote

aaron_sK wrote:
Separate grommet? I could have sworn the one in my IROC and the one in my Z were in the harness itself.


I can't say for 100% for I'm 98% sure the heater/AC wiring and vacuum lines came through their own grommet/section of the firewall almost dead center. /gnats memory
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nonsensekid20
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Joined: 30 Sep 2010
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1991 Chevrolet Camaro RS

PostPosted: Fri Jan 21, 2011 10:56 am    Post subject: Reply with quote

So can I run a straight vacuum line to the controller?
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nonsensekid20
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Joined: 30 Sep 2010
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1991 Chevrolet Camaro RS

PostPosted: Fri Jan 21, 2011 11:09 am    Post subject: Reply with quote

[quote="aaron_sK"]Haha... a cut-n-run guy, eh? Laughing quote]

Lol. I went from TBI to carbed, so i had to have taken out 100 wires. That harness that came through the passenger side fender had a bunch of wires i didn't need. But I still have the harness. If theres a vacuum line, I'll find it. lol
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iansane
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Location: Bothell

1991 Pontiac Trans Am

PostPosted: Fri Jan 21, 2011 11:41 am    Post subject: Reply with quote

nonsensekid20 wrote:
So can I run a straight vacuum line to the controller?


That's what I'm doing. Shrug Can't say I've noticed the doors changing around while I'm driving.
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Twilightoptics
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Joined: 13 Jan 2004
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Location: Auburn , WA

1987 Chevrolet Camaro IROC-Z

PostPosted: Fri Jan 21, 2011 11:45 am    Post subject: Reply with quote

All you need to do is plug the line from the heater valve. Two separate hard lines going into the interior compartment. One for the heater valve, and one is engine vacuum feed.
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nonsensekid20
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1991 Chevrolet Camaro RS

PostPosted: Fri Jan 21, 2011 11:54 am    Post subject: Reply with quote

This is the same for a carbed engine right? and do you have the vacuum line running from the engine to the purple line? That's input from what i've seen.
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BigDaddyVu
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Joined: 31 Jan 2004
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Location: Spokane, Wa

1986 Chevrolet Camaro Z/28

PostPosted: Fri Jan 21, 2011 5:10 pm    Post subject: Reply with quote




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nonsensekid20
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Joined: 30 Sep 2010
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1991 Chevrolet Camaro RS

PostPosted: Sun Jan 23, 2011 3:02 pm    Post subject: Reply with quote

So those 2 lines (Purple and Grey) Do they both hook into a vacuum line?
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nonsensekid20
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1991 Chevrolet Camaro RS

PostPosted: Sun Jan 23, 2011 3:37 pm    Post subject: Reply with quote

Twilightoptics wrote:
All you need to do is plug the line from the heater valve. Two separate hard lines going into the interior compartment. One for the heater valve, and one is engine vacuum feed.


What does the heater valve do?
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Al Hasse
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Joined: 19 Nov 2005
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Location: Bremerton, WA

1992 Chevrolet Camaro RS

PostPosted: Sun Jan 23, 2011 5:00 pm    Post subject: Reply with quote

The heater valve diverts coolant from the heater core when cool settings are selected.
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nonsensekid20
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1991 Chevrolet Camaro RS

PostPosted: Sun Jan 23, 2011 5:09 pm    Post subject: Reply with quote

Doubt I'll even be using the cool air. lol. "bypass" Laughing
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aaron_sK
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Joined: 23 Jan 2006
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Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Sun Jan 23, 2011 5:21 pm    Post subject: Reply with quote

That valve was designed to keep the interior cooler when the windows were up and the aircon or vent was on. Which is stupid... Unless you're over forty. Then it starts to make sense again. Razz
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nonsensekid20
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1991 Chevrolet Camaro RS

PostPosted: Sun Jan 23, 2011 5:24 pm    Post subject: Reply with quote

Yeah, windows up.. wth? hahah. I got T-Tops! I don't need no stinkin A/C!
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aaron_sK
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Joined: 23 Jan 2006
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Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Sun Jan 23, 2011 5:30 pm    Post subject: Reply with quote

You still need to find where that purple feed tube terminates, and get it check-valved vacuum from the reservoir.
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nonsensekid20
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1991 Chevrolet Camaro RS

PostPosted: Sun Jan 23, 2011 5:35 pm    Post subject: Reply with quote

I had it hooked up to the carb earlier. Just straight tube. What's hooking it up to the canister do?
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Twilightoptics
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1987 Chevrolet Camaro IROC-Z

PostPosted: Sun Jan 23, 2011 5:46 pm    Post subject: Reply with quote

Not the evap canister.

The vacuum reservoir.

Usually under the evap canister. It keeps vacuum in the system when there is no vacuum. Since all the controls are vacuum operated, if you have your setting on vent.... and got WOT where there is no engine vacuum, the vent setting will end up on defrost. The reservoir keeps vacuum to the system so it doesn't change. Same with Cruise Control. Go up a hill where the engine has less vacuum, cruise might cut out without the reservoir. That's why the res is directly plumbed into the cruise and hvac system.

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nonsensekid20
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1991 Chevrolet Camaro RS

PostPosted: Sun Jan 23, 2011 5:49 pm    Post subject: Reply with quote

So how do you hook up the resivor?
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aaron_sK
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Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z

PostPosted: Sun Jan 23, 2011 5:54 pm    Post subject: Reply with quote

Bashy Bashy

Dude, I don't mean to be rude here, but several people just wrote two pages here for you on how to do this. You could read it.
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