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

vac lines

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Old May 6, 2011 | 11:56 PM
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vac lines

ok so i cant remember where the vac lines the come out the top left corner of the stock topmount go. Any help would be great pictures that circle it would help as well. also can i just plug them or are they needed?
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Old May 7, 2011 | 12:38 AM
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Old May 7, 2011 | 12:05 PM
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Old May 7, 2011 | 12:26 PM
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I've never seen a TurboII with vacuum lines on the intercooler. Got a picture of your top mount intercooler?
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Old May 7, 2011 | 01:20 PM
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Ya give me a bit and ill post em.
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Old May 7, 2011 | 03:21 PM
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Don't bump in technical sections.

The connections you're talking about are for the ASV (air supply valve), which has a nipple nearby on the UIM, and for the AWS solenoid. They're both capped off on my top-mount because neither are functional with my setup.
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Old May 7, 2011 | 03:32 PM
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I was being a smart ***. The answer is there are no vacuum lines on the intercooler but you have two small air supply lines there doing what the 88 above said.

The air supply valve is on the back of the throttle body with a large nipple sticking up in the air and there should be a hose b/t there and the rear nipple on the intercooler.

The nipple sitcking out to the right side of the intercooler goes to the Air Bypass Solenoid Valve bolted to the top of the upper intake just to the right of the intercooler. Page 4B3 of the online FSM shows it.........kinda. Air Bypass Solenoid supplys air to the BAC for the first seventeen seconds upon startup when the engine is cold. There after it does nothing useful at all. Page 4B-5 shows it a bit better.
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Old May 7, 2011 | 05:57 PM
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these. where do they go?
if im to understand the one that bends goes to the back of the tb the large nipple at the bottom.


also just out of curiosity what hooks up here iv had some mixed opinions.
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Old May 7, 2011 | 08:54 PM
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Anything?
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Old May 7, 2011 | 09:09 PM
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Hmmm. It's been a while. I removed my air supply valve yrs ago on all my cars and plugged the intercooler.

I'll try to find a picture. I remember one on this forum somewhere. Later.

EDIT: Its the nipple in the jpg attached and that nipple is fed by the valve I pointed a red arrow at. Oops. Got that wrong. The nipple feeds the valve.
Attached Thumbnails vac lines-brakeboosterfeedline.jpg  
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Old May 7, 2011 | 09:15 PM
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Thanks iv been searching like crazy.
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Old May 7, 2011 | 09:28 PM
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Ok and that's one from the ic?
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Old May 7, 2011 | 09:39 PM
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Originally Posted by DRFT_HRD
Ok and that's one from the ic?
The nipple I put an arrow on gets a hose and it connects to the intercoolers rear small nipple. Yes.

I found a fellows turbo engine pictures that might help some. Attached
Attached Thumbnails vac lines-once.jpg   vac lines-oncetwice.jpg   vac lines-oncethrice.jpg   vac lines-greenconnector.jpg  
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Old May 7, 2011 | 11:15 PM
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Dude thank you so much!
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