Thread: 55.2-59 Starting issue
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Old 06-21-2020, 10:16 PM   #3
1project2many
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Join Date: Mar 2012
Location: Lakes Region NH
Posts: 3,159
Re: Starting issue

You wouldn't believe it, but this is almost a textbook problem from the '70s. The manifold can get flooded with fuel or vapor, either due to a leaking fuel well or due to fuel ebaporating out of the carb and filling the manifold. It's likely to happen again since you haven't cured it. If, try pushing the accelerator slowly to the floor then cranking. That allows a rush of fresh air to mix with the fuel. Be ready for the truck to begin to roar to life so you can release the throttle. In time you will be able to start the engine without anyone knowing what's happening.

If that helps you could try mixing 4 ozs of Marvel Mystery Oil to each ten gallons of gas. The heavier hydrocarbons in MMO seem to help reduce the amount of fuel vaporized during hot soak.
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