Record Gas Tank Refill

[jlindh]

ASHDUMP, the electric fuel pump is cooled by the fuel running thru it. Modern FI cars pump excess fuel to the injection system and the excess is returned to the tank. When there's low fuel in the tank, the fuel gets warm and doesn't properly cool the pump. At least that's my understanding.

 

[PSL]

I have heard it said that since the fuel pump is mounted in the tank and is submerged in the gasoline that the fuel pump is kept cool by the gas in the tank. When the tank runs low, there is less gas surrounding the pump and it gets warm. I don't know if it actually causes fuel pump premature failure or not, but it sort of rings true in that heating up and cooling down and related expansion and contraction could cause more wear and tear on the fuel pump.

 

[shagnat]

ASHDUMP, the electric fuel pump is cooled by the fuel running thru it. Modern FI cars pump excess fuel to the injection system and the excess is returned to the tank. When there's low fuel in the tank, the fuel gets warm and doesn't properly cool the pump. At least that's my understanding.

+1

 

[ASHDUMP]

Whats the typical life span of a fuel pump? Should last the life of the car?

I won't be changing my driving habits as so far things are working out well for me and my Genesis (knock on wood).

 

[PMCErnie]

I drive a lot.... I run the tank down to fumes all the time. Some people say its bad for the car... I don't know why or have never heard anyone state facts on their assumptions.

Because there is settlement at the bottom of the tank? Wheres the proof? So I must be burning up all the settlement while others are letting sludge build up?

Who knows...

Sediment, Ashdump, not settlement.

 

[Mark_888]

I have heard it said that since the fuel pump is mounted in the tank and is submerged in the gasoline that the fuel pump is kept cool by the gas in the tank. When the tank runs low, there is less gas surrounding the pump and it gets warm. I don't know if it actually causes fuel pump premature failure or not, but it sort of rings true in that heating up and cooling down and related expansion and contraction could cause more wear and tear on the fuel pump.

I think that was definitely a true statement at one time for most cars. Whether that is still true is hard to say. Designs and technology change, and things do not always work the same way as before. I personally have no knowledge about whether this is still a concern and whether it applies to the Hyundai Genesis, but I would be a little reticent to automatically assume things are the exactly the same way they were in the old days.