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#1 |
Registered User
Join Date: Feb 2009
Location: columbus, oh
Posts: 18
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misisng vacuum lines ?
Can anyone help me figure out what I am misisng? This is from my 72 c20 350. Is there a vacuum line diagram available anywhere? What is supposed to connect to the thing in red box? |
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#2 |
Gearhead and audio junkie
Join Date: Aug 2008
Location: nunyah
Posts: 452
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Re: misisng vacuum lines ?
Do you have A/c? im just taking a shot in the dark but it looks like (thing in red box)an idle compensator for when the a/c is on. and im pretty sure that line is for your PCV valve(coming off the carb)
Last edited by mikajo39; 07-09-2009 at 12:28 AM. |
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#3 |
Registered User
Join Date: Feb 2009
Location: columbus, oh
Posts: 18
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Re: misisng vacuum lines ?
no a/c in this truck. i'm pretty sure this carb is not stock.
Looks like previous owner replaced the stock with a 1984 model? Would that just be useless, then? thanks |
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#4 |
Big Red - Now its a SWB!
Join Date: Jun 2009
Location: Oroville, Ca
Posts: 1,624
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Re: misisng vacuum lines ?
Is this the stock engine? That has alot more vac lines than my 68 does, I know the 72's have a few more but it doesn't seem like there would be that many. If it came out of something else you'd have to find a vac diagram for that engine. Good luck, and hopefully someone else can be of more help than me!
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68 3/4 ton ![]() ![]() 41 3/4 ton ![]() 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's |
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#5 |
Registered User
Join Date: Feb 2009
Location: columbus, oh
Posts: 18
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Re: misisng vacuum lines ?
I am not sure if this is the stock engine. I guess I would have to find the code on the engine.
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#6 |
Registered User
Join Date: Apr 2006
Location: MinneSNOWta
Posts: 1,381
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Re: misisng vacuum lines ?
that looks like the exact setup that was in my 84 camaro. it's definately a later smog engine.
Red box is the Idle compensator. if you've no A/C nor the computer to control it, remove it. IIRC the nipple on the front of the carb is for the EGR (pancake thingy on passenger side of manifold) theres a flap valve in the top portion of the carb for returned gasses or whatever... just cap it and forget it. the orange thing in the water neck is a temperature controlled valve for the smog system. remove it, replace with a shiny new waterneck, a pretty pipe plug, or just ignore it. Bottom line, you have half an emissions system on that truck, and half won't help, so remove it.
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2003 GMC Sierra 1500 WT 1995 Nissan Hardbody 2016 Hyundai Veloster Turbo DC2 (SW/AW) Clyde W. Harvey USN "Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery" Winston Churchill |
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#7 |
Registered User
Join Date: Feb 2009
Location: columbus, oh
Posts: 18
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Re: misisng vacuum lines ?
Thanks, I'll be fixing up this soon.
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#8 |
Hollister Road Co.
Join Date: Apr 2005
Location: Houston
Posts: 6,134
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Re: misisng vacuum lines ?
My 72 doesn't look anything like that. I think you have a car motor in there.
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#9 |
Registered User
Join Date: Feb 2009
Location: columbus, oh
Posts: 18
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Re: misisng vacuum lines ?
I'd be curious to see what it should look like.
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#10 |
Account Suspended
Join Date: May 2009
Location: las vegas nv
Posts: 1,493
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Re: misisng vacuum lines ?
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#11 |
Registered User
Join Date: Apr 2002
Location: New Carlisle, Ohio,USA
Posts: 1,404
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Re: misisng vacuum lines ?
Hope this might help?
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