You're not retarded, you're just overcomplicating something that already happens. Others have explained why in this post.
The real issue with what you're describing is the inefficiency in powering a vacuum pump to gasify fuel to then run an engine instead of simply using the gasoline to run an engine. No increased fuel efficiency in your proposal would overcome the losses of running the pump in the first place.
Give me an example of what you'd like to do, and I'll do some math for you to demonstrate the initial losses you'd have to overcome in added engine efficiency.
You're correct. Others have explained why.
Now I would like to run an engine on ethyl alcohol.
That's much more doable in a modern engine. You'll have problems with the water content, especially in cold weather. You'll also lose quite a bit of the engine's rated output. This will require a free fuel source (wood, waste oil, dried jews, etc) to distill the alcohol. There are a few methods to dry the alcohol, but I can't imagine doing that on a large scale myself.
Sweet I've got all the dried jews in my basement. Knew they'd come in handy someday
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