lifter pump mod

[cebulmer1]

When doing this mod do you tie into the rubber line before the fuel pump?Or do you have to run new lines from tank up?

[guzzle]

A helper or lift pump needs to be placed as close to the tank as possible. The lines between the tank and the pump should be replaced to eliminate the factory fittings that allow air into the fuel system when under a vacuum. This is what causes a lot of the diesel cackle noise on the 7.3's dead head injector system.

Normally this mod is performed in conjunction with the Hutch mod to eliminate the parts of the fuel pickup that allow air to be sucked into the fuel lines when the tank is below 1/4 full. The Hutch mod will do away with the fuel intake screens found in the mixing chamber, so a pre-pump filter of about 2 micron's will also be needed.

[cebulmer1]

Are the replacement lines the metal ones or do most people switch to rubber fuel lines?

[DirtyDiesel]

does this mod help with power/smoke or is it just a precautionary measure for running out of fuel.

[guzzle]

Originally Posted by dirtydiesel

does this mod help with power/smoke or is it just a precautionary measure for running out of fuel.

The primary reason for the mod is to prolong the life of the factory pump. The side benefit is that the helper pump seems to help maintain an even fuel pressure to the fuel rails across the power band according to those that have installed an in-cab fuel pressure guage.

[DirtyDiesel]

so there is no noticable difference between having and not having the mod