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Dash vents

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Old Mar 22, 2018 | 10:27 AM
  #1  
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Car: 1991 camaro z28
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Dash vents

After my engine swap my dash vents havent been blowing what could be the cause my guess is a vacuum leak but I can't find the right line to check it

This it is usually plugged
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Old Mar 22, 2018 | 11:26 AM
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Re: Dash vents

Image 1 there should be two lines. One to the hvac control **** from manifold vacuum. The other goes from the hvac control **** to the heater control valve under the hood.
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Old Mar 22, 2018 | 12:12 PM
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Re: Dash vents

Oh okay in going to look for them as soon as I can any other help with this would be great because I only see one is it the same kind of plasic hose?
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Old Mar 22, 2018 | 12:15 PM
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Re: Dash vents

Yes same plastic line. Your heater control valve looks like this.
https://www.thirdgen.org/forums/tech...uum-lines.html
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Old Mar 22, 2018 | 12:42 PM
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Re: Dash vents

I only see the one line also I'm out of vacuum ports on my intake
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Old Mar 22, 2018 | 12:45 PM
  #6  
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Re: Dash vents

I found it it' broken off it was hiding in some electrical tape but the one that isn't broken it for the top of the old heater valve
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Old Mar 22, 2018 | 12:49 PM
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Re: Dash vents

You should have 2 hard lines coming outta that loom



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Old Mar 22, 2018 | 12:56 PM
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Re: Dash vents

Nice pictures bob. If you need a heater valve the carb version uses two ports.

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Old Mar 22, 2018 | 01:02 PM
  #9  
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Re: Dash vents

Oh I didn't know they made that I've gotten this far with it I put some rubber vacuum hose on that broken piece of vacuum hose I'm just trying to find a place where I can have constant vacuum
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Old Mar 22, 2018 | 01:03 PM
  #10  
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Re: Dash vents

also which one needs constant vacuum
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Old Mar 22, 2018 | 01:08 PM
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Re: Dash vents

Originally Posted by SketchyZed
also which one needs constant vacuum
They will not be marked you will just need to try them and see if your mode doors work.the vacuum lines should be 5/32 if you need to buy vacuum hose.
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Old Mar 22, 2018 | 01:10 PM
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Re: Dash vents

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Old Mar 22, 2018 | 01:13 PM
  #13  
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Re: Dash vents

Ooops sorry. You cant. Different FI setup sorry..
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Old Mar 22, 2018 | 01:23 PM
  #14  
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Re: Dash vents

I got it with a co worker never mind
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Old Mar 22, 2018 | 01:24 PM
  #15  
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Re: Dash vents

Got it fixed now it's blowing hot air all I need now is freon
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