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1969 chevy problem

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Old Jul 14, 2012 | 8:19 PM
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Default 1969 chevy problem

Here's our problem the thing idles perfect but once out on the road it stalls in and out as were driving we can't even make it out of the driveway without it stalling and if we do it shift gears twice maybe 3 times then starts putting out and we have to turn around and come back.
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Old Jul 15, 2012 | 8:33 AM
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Is the choke opening after it is warm?
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Old Jul 15, 2012 | 8:28 PM
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had to register new name can't login into my other account and admins wont get back too me

yes the choke opens after warming up
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Old Jul 15, 2012 | 10:28 PM
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Did this start all of a sudden or was something done to the engine before it started?
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Old Jul 15, 2012 | 11:35 PM
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Possibly the gas is perking out of the carburetor once it's getting hot. What carb do you have? I wouldn't be surprised if you say a Quadrajet, based on what's happening. Qjets can be temperamental sitting on top of a hot engine in the heat of the summer, especially if you still have the exhaust crossover on the intake manifold open. Your float level could be set too low as well, which can cause what you're describing.
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Old Jul 16, 2012 | 8:01 AM
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Change filter first if it's a quad or a 2gc it will be in the carb where the fuel line goes in. If that isn't it, I'd check float drop. As posted it may be too high, and not allowing enough gas into the bowl. I don't think heat has anything to do with it, just not enough gas.
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Old Jul 16, 2012 | 12:31 PM
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Been there, had that with the heat/perk thing. A heat shield, or phenolic carb spacer can help if that's the issue here.
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Old Jul 16, 2012 | 12:56 PM
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It could be vapor lock. Is the fuel line routed with sharp bends and or close to the exhaust?
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