2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Vacuum hose help?

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Old Aug 27, 2012 | 11:28 PM
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kagoostin's Avatar
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Vacuum hose help?

Hey guys im putting my engine back together and i cant figure where these plugs go.




I know for a fact that this hose goes on one of these.

Last edited by kagoostin; Aug 27, 2012 at 11:34 PM.
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Old Aug 27, 2012 | 11:32 PM
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The bac is supplied by the intake. Should have 2 hoses coming off it.

Is this an s5 or s4. I'll see if i can get pics tomorrow. That hose with the check valve goes on the side towards the fire wall should be a hose that runs under the tb to the vacuum pot actuator
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Old Aug 27, 2012 | 11:46 PM
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The white valve with the two nipple is the thermowax. Take the line in your last pic and connect it underneath your throttlebody to a actuators connected to the first set of butterfly valves. It's on the right hand side of your throttle body. Make sure the checkvalve is pointed in the right direction to allow air from the white valve to the actuator. Just blow into to both side to see which way that is. The second pic I believe connects to your bac. There should be a little valve that bolts to that side of your intake that it connects to. It has a wire with a white plug attached.
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Old Aug 27, 2012 | 11:56 PM
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He is right I mistyped. The line with the checkvalve goes to the nipple closet to the firewall
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Old Aug 27, 2012 | 11:57 PM
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okay i went ahead and found this and this is how its hooked up.
https://www.rx7club.com/attachments/...c-watertwo-jpg

I just need to find where this plug goes to


And as far as the second picture, i cant find any places to put the hose on, on the bac

I really appreciate the fast response
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Old Aug 28, 2012 | 09:03 AM
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Vacuum hose help?-forumrunner_20120828_100322.jpg



Vacuum hose help?-forumrunner_20120828_100310.jpg
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Old Aug 29, 2012 | 07:30 PM
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The second picture, it looks like they connect to each other? and the first its alittle hard to tell where the hose for the 3 way joint goes to
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Old Aug 29, 2012 | 11:20 PM
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Not sure why there is a test valve there. Doesn't look right to me. Is this an s4 or s5?
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Old Aug 29, 2012 | 11:20 PM
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T valve“
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Old Aug 30, 2012 | 01:35 AM
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Its off an s5
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