Modern fuel is not the same as it once was. It is more susceptible to evaporating out of the carb bowls as the car sits, as well as evaporating and boiling in the fuel lines
External pumps are nowhere near as reliable as in-tank ones. If they were, manufacturers wouldn't go through everything to put them inside the tank.
And adding an external pump does not give you a return line or a return fitting in your tank. Its the return style fuel setup that keeps fuel flowing, which keeps it cool.
Its a fact. If a car manufacturer could save $0.10 per car and get away with it, they would. 100% of the time. They determined long ago that external electric fuel pumps were not reliable enough to put them into the hundreds of millions of cars they manufacture. They could do it, but then the pump would burn up before the warranty was up and they'd have to replace the pump. It would cost them more than it saved them.
These FI conversions you know of using external pumps are small numbers of vehicles, with small numbers of miles on them. And you don't have to look too far into the reviews for these style of pumps to find somebody who's pump shat the bed on them.
That's the same thing my kids do when they want to win an argument. "Prove it" "name one example", etc.
2 can play at that game. Please list the names, addresses, install dates, and mileage of everybody you've ever met who's running an external electric fuel pump.
Its a fact of life. Those are not 200k mile fuel pumps. If I had a nickel for every external fuel pump I've seen go bad, I'd have enough to buy a new tank and an in-tank electric pump.
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