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I went out to crank my 307 today and it took it a while to crank which it never does.when I got it cranked it was vibrating badly,wouldn't idle,& wouldn't go over about 2500rpm at full throttle.after a while it began to idle poorly.I let it run for 10-15 min and it didn't really improve.what could it be?bad gas?the gas is new with additive.
 

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Soup to nuts.... Sounds like fuel delivery perhaps... Change your fuel filter & check for fuel at the carb....:yes:
 

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the car sat up for 5 years before I bought it.the carb has a rebuilt sticker on it,but as I said it sat up for 5 years.what could be wrong with it?
well a carb is ok when you keep gas in it. after awhile with no gas the gaskets inside it dry up and fall apart.

the float could also be not adjusted right or the fuel filter could be clogged up with crap.

I would rebuild the carburetor first. I am sure it needs it anyways.
 
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