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Old Apr 15, 2010 | 03:16 PM
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Default ls6 intake install

i just installed my ls6 intake yesterday, when i was putting the ls6 in, i noticted the small vacuum line on the back of the intake, there was nothing hooked up to that when i pulled out the stock ls1 intake...

what goes to this hookup? i didn't see any loose hoses hanging out back there so i need to know what is supposed to hook up there...
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Old Apr 15, 2010 | 03:42 PM
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probably your air valve?
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Old Apr 15, 2010 | 03:53 PM
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here are some pictures of when i first pulled off the LS1 intake...




i cleaned it up pretty good, didn't get any after pictures but it definatly looks alot better then that...

and this is the line hook up i am talking about, this is off of the LS1 intake but it looks exactly the same on the LS6..
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Old Apr 15, 2010 | 04:03 PM
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MAP sensor
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Old Apr 15, 2010 | 04:19 PM
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MAP sensor snaps on the top, big vacuum line is brake booster, small vacuum line is for your heater and a/c so it will change from floor-vents-defrost. Look around the back of the engine. It should be a small in diameter plastic hard vacuum line with a rubber T that presses onto the small vacuum fitting on the intake.
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Old Apr 15, 2010 | 04:20 PM
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not the hole. i swapped that plug from the ls1 to the ls6 intake, i'm talking about what is now circled in red

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Old Apr 15, 2010 | 04:22 PM
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Originally Posted by 02 BLK WS6
MAP sensor snaps on the top, big vacuum line is brake booster, small vacuum line is for your heater and a/c so it will change from floor-vents-defrost. Look around the back of the engine. It should be a small in diameter plastic hard vacuum line with a rubber T that presses onto the small vacuum fitting on the intake.
my a/c was removed by the previous owner, will that vacuum line still be there? i looked all over back there and saw nothing like what you described..

if i don't have that line to hook up should i cap off that connection on the intake?
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Old Apr 15, 2010 | 04:24 PM
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i do still have all the heater stuff in the car, maybe since that line isn't there thats why it seems like my floor vents are always opened... i'll do somemore digging back there and see if i can find it, if he took that line out, where do i need to run a new one too?
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Old Apr 15, 2010 | 04:59 PM
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Originally Posted by Tx98Formula
i do still have all the heater stuff in the car, maybe since that line isn't there thats why it seems like my floor vents are always opened... i'll do somemore digging back there and see if i can find it, if he took that line out, where do i need to run a new one too?
With that line being off will cause it not to switch to the vents. The line is more than likely still hanging around somewhere.

The line is about 1/8" and it hard plastic
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Old Apr 15, 2010 | 05:43 PM
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ok thanks guys, i'll get down in there and look around a little more..

with the other pictures that i posted, how bad is it that everything was so dirty under the stock intake? is that something that is normal or with all the build up and gunk under there could there be something wrong?
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Old Apr 15, 2010 | 05:50 PM
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^^^^ Normal... I have seen much worse.....
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Old Apr 15, 2010 | 06:08 PM
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ok cool!! that makes me feel much better

thanks again!
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