Carburetors Carb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

vac nightmare

Old Apr 5, 2005 | 06:13 PM
  #1  
WaaX's Avatar
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From: Saint Clair Shores, Michigan
Car: 1985 IROC
Engine: 350 TPI (block was swapped)
Transmission: 700r4 w/corvette servo
Axle/Gears: no idea
vac nightmare

Okay, so today i decided to give a very good look over of my engine, and found something bad.

the vacum lines are all f'd up,

http://img184.exs.cx/img184/6583/dscf08701wa.jpg

in that picture, the hose on the very right of the canister isnt connected to anything, where does it go?

also:
http://img184.exs.cx/img184/8677/dscf08698zw.jpg

thats the diaphram, right?

well it had a hose coming out of it, also not attatched to anything
In the first picture, if you look, there is also a smaller hose that isnt connected to anything (following the big one thats not connected) I got some new line and attatched the smaller one to the diaphram.


i can take more pictures if need be.

Last edited by WaaX; Apr 5, 2005 at 06:15 PM.
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Old Apr 5, 2005 | 07:00 PM
  #2  
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From: Saint Clair Shores, Michigan
Car: 1985 IROC
Engine: 350 TPI (block was swapped)
Transmission: 700r4 w/corvette servo
Axle/Gears: no idea
pretty much all i need to know is where the hell that big fat hose connects to (the one closest to the fender)
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Old Apr 8, 2005 | 08:47 AM
  #3  
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From: Akron,Oh
Car: 88 Camaro
Engine: 5.3
Transmission: TH350
alrite. in my 84 camaro carbed' the charcol canister (big fat can driver side fender area) the right hose goes to my fuel tank. on top of the canister it will say where it goes. itl say tank, and carb. there is whats called a ported vacuum switch on the intake, which on the top it goes to a vaccum regulator, and on the bottom, it goes directly to that canister. hopes that helps ya!
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Old Apr 9, 2005 | 03:16 AM
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From: Saint Clair Shores, Michigan
Car: 1985 IROC
Engine: 350 TPI (block was swapped)
Transmission: 700r4 w/corvette servo
Axle/Gears: no idea
****, wonder why its not connected >.<
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Old Apr 10, 2005 | 10:18 AM
  #5  
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
What carb are you running?
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Old Apr 10, 2005 | 10:40 PM
  #6  
WaaX's Avatar
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From: Saint Clair Shores, Michigan
Car: 1985 IROC
Engine: 350 TPI (block was swapped)
Transmission: 700r4 w/corvette servo
Axle/Gears: no idea
quadrajet
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Old Apr 11, 2005 | 03:40 AM
  #7  
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From: Saint Clair Shores, Michigan
Car: 1985 IROC
Engine: 350 TPI (block was swapped)
Transmission: 700r4 w/corvette servo
Axle/Gears: no idea
Why do you ask?
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Old Apr 11, 2005 | 01:01 PM
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five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
One of the big lines that ends up at the charcoal canister goes to the carb bowl. Most aftermarket carbs don't have that provision.

Do you still have that valve that sits at the front of the engine with all the vacuum lines on it?
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Old Apr 14, 2005 | 05:28 PM
  #9  
WaaX's Avatar
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From: Saint Clair Shores, Michigan
Car: 1985 IROC
Engine: 350 TPI (block was swapped)
Transmission: 700r4 w/corvette servo
Axle/Gears: no idea
you mean that thing with the blue paint on it?
*see picture*

http://img211.echo.cx/img211/3980/76kz.jpg
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Old Apr 14, 2005 | 06:14 PM
  #10  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
No, I meant the canister purge valve.
Attached Thumbnails vac nightmare-canister-purge-valve.jpg  
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Old Apr 14, 2005 | 06:22 PM
  #11  
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From: Saint Clair Shores, Michigan
Car: 1985 IROC
Engine: 350 TPI (block was swapped)
Transmission: 700r4 w/corvette servo
Axle/Gears: no idea
nope, cant say that i do
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Old Apr 14, 2005 | 06:28 PM
  #12  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
You appear to have a lot of things that aren't connected to anything. Is there anything in particular that you're trying to solve?
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Old Apr 14, 2005 | 07:23 PM
  #13  
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From: Saint Clair Shores, Michigan
Car: 1985 IROC
Engine: 350 TPI (block was swapped)
Transmission: 700r4 w/corvette servo
Axle/Gears: no idea
haha, ***, i hate the condition my car is in.

I wish i knew more of the technical side of cars, but yeah, I want my car to run nice, and have good gas mileage, I want everything to be hooked up the way its meant to be. and youre right, i have a lot of things that arent hooked up to anything, and it really pisses me off but at least the car drives. If I can slowley put the pieces back together, than sweet, im happy. But I also dont have the income to bring it to a shop and have them figure it out for me.
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Old Apr 15, 2005 | 02:24 AM
  #14  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Well, that's a mechanical q-jet. So, if you don't have a vacuum/mechanical advance distributor on it as well, that's a good way to get bad mileage. Does the distributor have a silver "can" sticking out of the base below the cap?
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Old Apr 15, 2005 | 04:25 AM
  #15  
WaaX's Avatar
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From: Saint Clair Shores, Michigan
Car: 1985 IROC
Engine: 350 TPI (block was swapped)
Transmission: 700r4 w/corvette servo
Axle/Gears: no idea
yeah it does, the vacuum line runs to the front of the carb.
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