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

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Old 12-09-2007, 12:59 PM   #1
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Join Date: Sep 2003
Location: Nanaimo, BC, Canada. (West Coast)
Posts: 651
Car: 1988 Camaro IROC
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.27 9 bolt posi (non 1le)

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Q-jet... Nothing

So I've got a engine from the 1970's with a Qjet on it. It's also got an electric choke.

The carb was rebuilt with the standard rebuild kit just new gaskets and such. I reinstalled the carb and now the engine just cranks doesn't try to start at all.

It's getting fuel, maybe even too much fuel. But just wondering if anyone had any ideas on where I should start troubleshooting.

The choke isn't hooked up to anything, and there are 3 hoses on the carb that are blocked off.

The ones that are hooked up are:

Fuel, Brake booster, one goes to the top of the valve cover, one goes back just under the dist.

There are two on the front that are blocked, and one on the back.

I know without pics its a hard shoot, but just wondering if anyone had any suggestions on where to start
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Old 12-09-2007, 01:08 PM   #2
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Join Date: Jul 2004
Location: Calgary, AB, Canada
Posts: 10,466
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73

Classifieds Rating: (1)
Re: Q-jet... Nothing

How do you know it's getting fuel? When looking down the primary butterflies, and you rotate the throttle linkage, you can see a spurt of gas?
If so, then it's spark. Fuel is REALLY easy. As long as you can see it, the car should at least try to start. It'd chug and spurt and run for a few seconds then die (if there's a problem). But if it won't catch at all, it's spark.
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Old 12-09-2007, 01:24 PM   #3
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Join Date: Mar 2004
Location: San Antonio, Tx
Posts: 525
Car: 86 Camaro Z28/ 87 Camaro IROC
Engine: 5.0L TPI LB9 / 5.7 TPI w/cam
Transmission: 700R4 w/ TCI Racing Parts/ Transcat
Axle/Gears: 2.73 Highway Haulers/ 3.23

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Re: Q-jet... Nothing

Are you sure its getting gas?

Have you cracked open the door and looked inside while you press the throttle lever to see if the primaries or secondaries are actually squirting gas?

When carb cars sit for awhile they usually dont have the pressure to push gas through the system to fill up the fuel bowl.

If you see no gas squirting, then get an empty can and get some gas into it. Open up the secondaries and pour a good swig directly into the carb.

Now when you go to start it and the engine chugs along and dies, that means it burned whatever you put in and ran out of gas. Pour some more gas into the engine and pump it while you are starting it up. After awhile, you might have to really floor it but give the above the try first.
----------
Damn sonix ... me slow multitasker, you beat me to the punch...

Quote:
Originally Posted by Sonix View Post
How do you know it's getting fuel? When looking down the primary butterflies, and you rotate the throttle linkage, you can see a spurt of gas?
If so, then it's spark. Fuel is REALLY easy. As long as you can see it, the car should at least try to start. It'd chug and spurt and run for a few seconds then die (if there's a problem). But if it won't catch at all, it's spark.

Last edited by Lucid; 12-09-2007 at 01:26 PM. Reason: Automerged Doublepost
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