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I think your crew member has a plausible explanation for the issue. I don't have any experience on a '59 Nash, not even close. Most my comparible experience is with pre-80's motorcycles. I have repeatedly seen carbs leak initially when putting fuel into a system that has been dry for a decade plus, they frequently have air leaks and fuel leaks. It seems ...


If you look at your engine you will see that in 1974 almost all emission controls were connected to or controlled by a vacuum hose. As the hose ages it cracks and causes vacuum leaks. Many of the components had no vacuum applied until the engine was warm and above idle speed. This can result in good idle and performance cold but a vacuum leak and poor ...

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