Imo, 3 cycles isn't enough. I've done quite a few of these and my rule with every thing is 6 cycles, 20-30 seconds each. You should Def notice a change in pump tone once it lugs down and is pushing straight fuel.
They're all hot and discolored after use. Maybe your contacts had a bit more moisture on them their entire life.
I still want you to pull carpet up and check if this thing was a flood truck. Lol.
Usually you take the fender wells out and you find the areas that are chewed. If that is your issue but in this case it sounds like this truck has electrical issues.
Florida..? Peel the carpet up. Look for sand...
Combined with your other issue I'd suspect you have rodents. Chewing on your soy based wiring.
Any chance of this? Mice, shrews, squirrels, etc in your area?
Can you link the Google profile of the place you are referring to..?
Im seeing absolutely horrid reviews. I don't know why anyone would proceed with seeing those ratings.