Good Morning Carl !!

That fuel pump came off of my spare (never used nor run by me) generator….

Oddly - on that generator - it had a manual / mechanical fuel pressure regulator.

I’m running that same pump on the 4K generator in my coach with no problems.

But - I didn’t investigate to confirm that the pumps were identical…. And I don’t know if facet has different pump specifications with all pumps in that same body. If it’s a higher pressure pump - that would explain the pressure regulator. Perhaps it would contribute to the weird carb issues you’re seeing.

Thanks for spreading good GMC karma.

Steve W