6.7 fuel pump on 7.3.

[Vader's Fury]

They didn't put dual hpops on from the factory either....

I say a fuel cooler depends on what you plan to do with the truck. If your always towing heavy for extended periods of time, it may not be nessesary but it sure wouldn't hurt.

Also remember that the original fuel system only returned fuel from the fuel bowl. If your running a regulated return where all the fuel goes through the heads, that will result in a much higher temperature of fuel returning to the fuel tank.

 

[campbellflage]

They didn't put dual hpops on from the factory either....

I say a fuel cooler depends on what you plan to do with the truck. If your always towing heavy for extended periods of time, it may not be nessesary but it sure wouldn't hurt.

Also remember that the original fuel system only returned fuel from the fuel bowl. If your running a regulated return where all the fuel goes through the heads, that will result in a much higher temperature of fuel returning to the fuel tank.

Thats what i was thinking, and on longer drives it would probably get the fuel pretty hot! I don't tow much, just a pontoon boat every now and then, but this is florida and its always hot.

 

[kyle43335]

system will only flow what the smallest orfice size will allow.

 

[campbellflage]

system will only flow what the smallest orfice size will allow.

ok? what does that mean? they make 8an fuel coolers

 

[campbellflage]

http://www.ebay.com/itm/10AN-Extruded-Aluminum-Fuel-Cooler-/281663836998?hash=item4194791346&vxp=mtr

 

[Vader's Fury]

ok? what does that mean? they make 8an fuel coolers

Guess he will not be answering for awhile.

 

[dsberman94]

Yea probably not. And that says 10an, not 8

 

[campbellflage]

Yea probably not. And that says 10an, not 8

I know i just threw that one up there for example.

 

[dsberman94]

I know i just threw that one up there for example.

Gotcha.

 

[campbellflage]

kit should come in the mail today. Hurry up ups!

 

[campbellflage]

brown truck came, thought i would share the pics
Since this pump is 1/2 inch on the 6.7's Marty decided it would be easiest to just keep it 1/2 inch for this setup, so 1/2 in drawstraw, to pump, 8an forward to tie into my existing reg return, then 6an to pump, 6 an out of pump to tank.
Will order a fuel cooler tonight since the truck is a crew cab long bed, I have plenty of real estate to mount it, and why not.

 

[lincolnlocker]

guess i still dont see how routing the fuel back to the pump before it goes to the tank will work...

live life full throttle

 

[campbellflage]

guess i still dont see how routing the fuel back to the pump before it goes to the tank will work...

live life full throttle

I have to research it more, but that is how it is ran on the 6.7, i don't see any issue doing it on the 7.3, i was thinking there is a pressure bleed off due to it pushing huge amounts of fuel, since it pushes 3 times more than the 6.7 needs in stock tuning i was under the impression that it dumps anything above a certain pressure. not sure, I will see how it goes after the install. I can't find schematics of it online.

 

[lincolnlocker]

I have to research it more, but that is how it is ran on the 6.7, i don't see any issue doing it on the 7.3, i was thinking there is a pressure bleed off due to it pushing huge amounts of fuel, since it pushes 3 times more than the 6.7 needs in stock tuning i was under the impression that it dumps anything above a certain pressure. not sure, I will see how it goes after the install. I can't find schematics of it online.

i didn't know thats how it worked on the 6.7s. guess ill look next time im under it..

live life full throttle

 

[campbellflage]

I can post pics of the pump, i mean i guess i could block off the fittings on it?

 

[Ron's Power Stroke]

The electric FP : on a 6.7 draws fuel from the fuel tank.
circulates fuel at low pressure through the 10 micron fuel filter located in the diesel fuel conditioning module to the engine mounted secondary fuel filter and fuel injectors to initially fill the hydraulic couplers. The fuel is filtered through the 2 to 4 micron engine mounted secondary fuel filter, and then supplied to the high-pressure fuel injection pump. Fuel is returned from the injectors through the fuel injector return hose and combines with fuel being supplied to the inlet of the engine mounted secondary fuel filter. Fuel that is returned from the fuel rail combines with fuel being returned from the high-pressure fuel injection pump and passes through the frame mounted fuel cooler to the diesel fuel conditioning module. The diesel fuel conditioning module contains a thermal recirculating valve that, based on fuel temperature, allows the returning fuel to be sent through the fuel conditioning module or sent back to the fuel tank.

 

[campbellflage]

The electric FP : on a 6.7 draws fuel from the fuel tank.
circulates fuel at low pressure through the 10 micron fuel filter located in the diesel fuel conditioning module to the engine mounted secondary fuel filter and fuel injectors to initially fill the hydraulic couplers. The fuel is filtered through the 2 to 4 micron engine mounted secondary fuel filter, and then supplied to the high-pressure fuel injection pump. Fuel is returned from the injectors through the fuel injector return hose and combines with fuel being supplied to the inlet of the engine mounted secondary fuel filter. Fuel that is returned from the fuel rail combines with fuel being returned from the high-pressure fuel injection pump and passes through the frame mounted fuel cooler to the diesel fuel conditioning module. The diesel fuel conditioning module contains a thermal recirculating valve that, based on fuel temperature, allows the returning fuel to be sent through the fuel conditioning module or sent back to the fuel tank.

So based on fuel temp the fuel is either reused or sent back to the tank? So If I am going to put a fuel cooler on this setup, would you go before or after the pump?

 

[Ron's Power Stroke]

it sounds like the cooler is in the return just before the tank....i would think for use on the the 7.3 the return will remain the same..return fuel from the bowl or return from a regulator on a RR set up through a cooler then too the tank....

Fuel System — 6.7 Diesel Engine
The diesel fuel system consists of the following:

Fuel tubes
Vapor tube (midship fuel tank)
Fuel filters (located on the engine and in the fuel conditioning module)
Fuel level sensor
Fuel tank filler pipe assembly
Fuel tank
Fuel tank selector switch (if equipped)
Fuel tank selector valve (if equipped)
High-pressure fuel system (located on the engine)
Diesel fuel conditioning module (located on the LH frame rail)
Inertia Fuel Shutoff (IFS) switch (located on the RH side of the instrument panel)
Low fuel pressure switch (located on the supply line between the engine mounted fuel filter and high pressure pump)
The fuel system for the high-pressure common rail direct injection turbocharged diesel engine:

is controlled by the PCM.
utilizes a diesel fuel conditioning module, which contains an electric Fuel Pump (FP) and incorporates a fuel filter and water separator assembly.
The electric FP :

draws fuel from the fuel tank.
circulates fuel at low pressure through the 10 micron fuel filter located in the diesel fuel conditioning module to the engine mounted secondary fuel filter and fuel injectors to initially fill the hydraulic couplers. The fuel is filtered through the 2 to 4 micron engine mounted secondary fuel filter, and then supplied to the high-pressure fuel injection pump. Fuel is returned from the injectors through the fuel injector return hose and combines with fuel being supplied to the inlet of the engine mounted secondary fuel filter. Fuel that is returned from the fuel rail combines with fuel being returned from the high-pressure fuel injection pump and passes through the frame mounted fuel cooler to the diesel fuel conditioning module. The diesel fuel conditioning module contains a thermal recirculating valve that, based on fuel temperature, allows the returning fuel to be sent through the fuel conditioning module or sent back to the fuel tank.
Fuel Filter/Water Separator

The vehicle is equipped with a diesel fuel conditioning module. The diesel fuel conditioning module contains a fuel filter and water separator. Drain the water from the diesel fuel conditioning module at the recommended maintenance intervals. Refer to the Owner's Literature for the maintenance intervals.

While the engine is running a water in fuel indicator on the instrument panel or a “Water in Fuel, Drain Filter” message on the instrument panel message center will alert the operator. When this occurs drain the water from the diesel fuel conditioning module as soon as possible to prevent damage to the fuel injection system.

Fuel Tank Selector Switch/Valve

If equipped, the fuel tank selector valve and fuel tank selector switch allows the use of 2 fuel tanks. When the fuel tank selector switch is in the front position, the fuel tank selector valve will allow fuel to flow from the auxiliary fuel tank. When the fuel tank selector switch is in the rear position, the fuel tank selector valve will allow fuel to flow from the aft-of-axle tank. The fuel gauge will read the correct amount of fuel in each tank depending on which tank is selected with the fuel tank selector switch.

 

[campbellflage]

So your thinking skip the pump return?

 

[Ron's Power Stroke]

the way i read it the 6.7 EF feeds a HP injector pump..the return is at the feed side of the HP pump not the EFP.the 7.3 does not have a HP injector pump to return from..instead we return from the bowl or regulator..