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Old 06-23-2020, 10:53 AM   #7
Jim Brierley
Senior Member
Join Date: Jun 2010
Location: Temecula, CA
Posts: 3,505
Default Re: Downdraft Carburetor question?

Newer cars had a fuel return line so that when the engine was shut off, the fuel pressure in the line was bled off and returned to the tank. This prevented the condition you describe. The Ford 300 CID truck engines did that until Ford sent a bulletin telling owners to drill a very small hole in the fuel pump body that did the same thing. If you are using an electric pump, turn it off a few hundred feet before shutting the engine off. Don't forget to turn it back on after re-starting and heading out, it can be embarrassing. Don't ask how I know this!
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