Engine/Transmission (1998.5 - 2002) Thinking out of the box: Lift pump failures

[TboneMan]

It appears as though many have gone great lengths (and expense) to resolve the fuel transfer problem.



There have been many posts about the hydrologic principles involved.



In most cases people discuss the pump side of the equation. A couple of people have discussed elevation (get the tank higher than the engine and let gravity help).



Thinking out of the box a bit, has anyone experimented with pressurizing the fuel tank?



I'm no mechanical engineer, but I would think raising the pressure in the fuel tank a half an atmosphere or so would help the pumps a bit.



Think of a keg of beer! Add pressure, out comes the beverage!

 

[Gary - K7GLD]

That might adversely affect the fuel return of excess fuel that is returned to the tank - but yes, it has been suggested...

 

[Whitmore]

This practice happens all the time in industry, the term is blanket gas and it is usually nitrogen or some other enert type of gas and you are right that it does help to supply the liquid in a positive pressur but we have one problemm with your idea , our tanks are not rated for pressure and Gary is right too in the fact that the pressure would have an adverse affect on the return line comming back in... ... ..... its all about head pressure, I like it , I want it and I got it



cheers, Kevin

 

[Gary - K7GLD]

I got head pressure too - but an Excedrin usually fixes me right up...

 

[A Johnson]

Return Pressure?

Acccording to my ISB manual, maximum fuel drain line restriction is 10 PSI.



A Johnson