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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.

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Old 07-31-2009, 06:57 AM   #1
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Car: 87 T/A * 86 T/A
Engine: 305 TPI * 305 4bbl.
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Quadrajet vacuum lines?

So I bought an 85 T/A that has had a 355 dropped into it. Right now, its tsrats fine, but when you throttle up, it bogs badly, and after a few minutes of running, dies. It seems to be sucking air under load, making a whuffing noise. Very little power.

Now, there is a vacuum tree that is completely capped off behind the carb, and the vacuum canister isnt hooked up at all. I'm hoping this is a combination vacuum and timing issue. I pulled the only info off the carb I could find. On the drivers side of it, it says Quadrajet by Carter, and has the nubers 17058213, 1508 BJB.

How do I determine what this carb is, and what the proper routing for the vacuum lines are?
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Old 07-31-2009, 07:31 AM   #2
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What an amazing thing, this Goggle. . .

These guys used that very carb # for their example on how to decode q-jet numbers http://www.4wheelnoffroad.com/qjetid.html

That would be a non-computer q-jet. Unless you have a non-computer distributor, it will never run correctly.

Sounds like your poor car has been hacked up by a ham-fisted magazine mechanic. Post pics if you can, we might be able to help you sort it out. Carb, distributor, any vacuum lines that are attached, those that are capped off, etc.
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Old 07-31-2009, 09:08 AM   #3
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Re: Quadrajet vacuum lines?

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Originally Posted by five7kid View Post
What an amazing thing, this Goggle. . .

These guys used that very carb # for their example on how to decode q-jet numbers http://www.4wheelnoffroad.com/qjetid.html

That would be a non-computer q-jet. Unless you have a non-computer distributor, it will never run correctly.

Sounds like your poor car has been hacked up by a ham-fisted magazine mechanic. Post pics if you can, we might be able to help you sort it out. Carb, distributor, any vacuum lines that are attached, those that are capped off, etc.
Actually, I was kind of surprised by how cautiously they did the mod. No wiring was cut, even the injector harness is neatly coiled up and tied to the fire wall. It just looks like it was never finished. Looks like some of the fuel lines were a little hacked however. Here are some pics, I'll try to get some better ones tonight.
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File Type: jpg carb.jpg (1.00 MB, 81 views)
File Type: jpg engine.jpg (875.4 KB, 66 views)
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Old 07-31-2009, 11:11 AM   #4
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Re: Quadrajet vacuum lines?

Ya don't need all that canister stuff as long as the right lines are plugged so you don't have a vacuum leak. Just don't plug the tank vent line.

this pic may help on hook up.

Click the image to open in full size.
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Old 04-29-2010, 09:29 AM   #5
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Re: Quadrajet vacuum lines?

Gumby,
I was just wondering where you got that image from was it from a book you acquired, i believe what ever you have could really help me
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Old 05-15-2010, 07:43 PM   #6
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Re: Quadrajet vacuum lines?

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Gumby,
I was just wondering where you got that image from was it from a book you acquired, i believe what ever you have could really help me
that was from the direction for one of those holley eco crap carbs that was to replace a stock Qjet.
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