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truck intake question

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Old Nov 11, 2015 | 08:25 PM
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so cleaning up my 6l tonight and came across a poppet valve or something on the drivers side rear of the intake that sits parallel to the fuel rail
black **** red sleeve with a couple holes in it that moves in and out so the holes are covered or not

don't even know what to call it in order to search for info so maybe someone can enlighten me
if it is some form of valve - how would boost affect it, and how would one sea lit up if needed
what is it for?

thanks in advance
Ken
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Old Nov 13, 2015 | 07:37 PM
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Please tell us:

Year of the vehicle.
Model of the vehicle.
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Old Nov 13, 2015 | 07:40 PM
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2003 truck - there are pics on this site showing this thing on the back of the intake but I didn't book mark them and I have looked at hundreds of posts so do not remember where I saw them
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Old Nov 13, 2015 | 08:25 PM
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Op without seeing it I believe your talking about the port that connect to brake booster vacuum line. Next
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Old Nov 13, 2015 | 08:32 PM
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http://z71.net/6772/05intake.jpg

you can just see the red sleeve peeking out at the upper left of the intake beside the fuel rail
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Old Nov 13, 2015 | 08:48 PM
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Originally Posted by Seeker1056
http://z71.net/6772/05intake.jpg

you can just see the red sleeve peeking out at the upper left of the intake beside the fuel rail
It's brake booster vacuum line ! Ok
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Old Nov 13, 2015 | 09:30 PM
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this motor had hydrostat brakes - so it is not a brake booster line - although it could be some form of plug for where the brake booster line would go normally
it moves in and out about 1/4" - when in the out position it has three slots showing which is why it confuses me
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Old Nov 13, 2015 | 10:25 PM
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Yes, that's the vacuum port for a brake booster. If your truck had hydro brakes, it was probably plugged or capped somehow.
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Old Nov 13, 2015 | 11:33 PM
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I just asked this same question a couple days ago. Hah. I ordered a nipple that goes into it so I can use it for the brake booster on my Volvo.

Pull the black piece and then press the red ring in and the "plug" will come out.

ACDelco 12559760 ACDelco 12559760

Originally Posted by Seeker1056
this motor had hydrostat brakes - so it is not a brake booster line - although it could be some form of plug for where the brake booster line would go normally
it moves in and out about 1/4" - when in the out position it has three slots showing which is why it confuses me
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