I'd check the electric going to the fuel pump as well as any other devices. An intermittent short, bad ground wire can stop the fuel pump.
I'd be more specific with the description. "Falls on it's face", is not a good description.
The car loses power and you can hear backfiring through the exhaust and a 1986 horizon has a mechanical fuel pump so there is no power to check
How does the mechanical fuel pump get the fuel to the engine?The fuel pumps I saw for the Horizon all had electric connections on them.
No electric connections on this one or the factory one I just replaced
What about vapor lock? Are all the heat shields in place protecting the fuel lines?
that was one of the first things i checked everything is good there
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