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08-18-2014, 01:32 PM
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#1 |
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Registered User
Join Date: Dec 2013
Location: South Dakota
Posts: 31
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unknown truck manifold port
I have started a L96/4l80e swap into my '70 c10. I am having issues determining what the port is for on the passenger side of the truck intake manifold. I'm on a work trip so I can't take anymore pics than what I have below. I'm hoping to find out where it should go/connect to before o get back in case I need to order more parts.
I have used this site a lot to get to where I'm currently at and wanted to thank you ahead of time. I have been unable to find this info for the last week of searching. |
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08-18-2014, 01:37 PM
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#2 |
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Registered User
Join Date: Dec 2013
Location: South Dakota
Posts: 31
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Re: unknown truck manifold port
I was unable to circle the actual area I'm asking about but its the vent/vacuum/whatever in the black plastic molding (intake manifold).
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08-18-2014, 01:45 PM
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#3 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: unknown truck manifold port
it was used for vacumm in the hvac system just put a rubber cap over it
__________________
David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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08-18-2014, 03:11 PM
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#4 |
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Registered User
 
Join Date: May 2011
Location: Missoula, MT
Posts: 934
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Re: unknown truck manifold port
On my truck that port was blocked off from the factory. I broke the tang off so I could use it as an access port to run sea foam through the intake every so often and I just use a rubber plug to block it off the rest of the time.
Block it off and you will be just fine.
__________________
69 GMC C10 build thread- http://67-72chevytrucks.com/vboard/s...d.php?t=501676 03 Silverado build thread-http://67-72chevytrucks.com/vboard/s...d.php?t=591582 |
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08-18-2014, 07:14 PM
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#5 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: unknown truck manifold port
As they mentioned, its an a vac port that is 90% unused. Most of the time it'll have a black or red cap in/on it. You can plug it if it doesn't. Some folks "shave" and plug it, but if you use an engine cover you'll never see it anyway.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING  |
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08-19-2014, 02:01 PM
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#6 |
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Registered User
Join Date: Dec 2013
Location: South Dakota
Posts: 31
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Re: unknown truck manifold port
Thanks!
I'm also able to block-off/cap the line for the vapor canister as well? I have the speartech harness so the emissions should be taken care of in the ecm. |
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08-19-2014, 03:47 PM
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#7 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: unknown truck manifold port
You can plug the hole, or just leave it sitting there. The unit is normall OFF, so if its not wired up, it plugs its own hole. You only need a physical plug if you remove the whole EVAP from the intake manifold.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING |
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