Can a bad fuse box cause the engine to misfire

What is your question?

Whenever I do a hard pull I get a Blinking check engine light that goes away after 30 seconds to a minute. I know this means the engine is misfiring . Today I took the car to a mechanic shop however they could not locate a code they want me to drive it for a few days and come back. They did discover the fuse box is bad I have a new one coming but I'm unsure if this would be causing a misfire

What makes this problem better or worse?

The problem occurs when I Accelerate quickly

How long has your 2014 Ford Mustang had this problem?

A week