That is the way I understand it also. No pump in the tank.

 

I didn't read anything about a pump in the tank in the 2004 shop manual:



DESCRIPTION - DIESEL FUEL SYSTEM
The fuel system used on the Cummins engine is an
electronically controlled, Bosch HPCR (High-Pressure
Common Rail) system. The HPCR system consists of
five main components:
² Electric Fuel Transfer (lift) Pump
² Fuel Pump/Gear Pump (attached to fuel injection
pump)
² High-Pressure Fuel Injection Pump
² Fuel Injection Rail
² Fuel Injectors
Also to be considered as part of the overall fuel
system are:
² Accelerator Pedal
² Air Cleaner Housing/Element
² Fuel Drain Manifold (passage)
² Fuel Drain Valve (at filter)
² Fuel Filter/Water Separator
² Fuel Heater
² Fuel Heater Relay
² Fuel Level (gauge) Sending Unit
² Fuel Pressure Limiting Valve
² Fuel Tank
² Fuel Tank Module (containing fuel gauge sending
unit and separate fuel filter located at bottom of
tank module)
² Fuel Tank Filler/Vent Tube Assembly
² Fuel Tank Filler Tube Cap
² Fuel Tubes/Lines/Hoses
² High-Pressure Fuel Injector Lines
² In-Tank Fuel Filter (at bottom of fuel tank module)
² Low-Pressure Fuel Supply Lines
² Low-Pressure Fuel Return Line
² Overflow Valve
² Quick-Connect Fuel Line Fittings
² Throttle Cable
² Water Draining (maintenance)
² Water-In-Fuel (WIF) Sensor

 

Looks like I'm wrong.

Handymantim, any chance you have a picture of the left side of the motor that you can copy out of your manual? I'd like to see what this new set up looks like.

 

Let me know if you can't read this picture.

 

Many thanks.

Thats interesting, to me anyway, that they have put the electric pump on the engine and incorporated it as both pumps. Hmmmm, I predict problems down the road with this thing.

On the old motors the lift pumps did go bad, but was a cheap and fairly easy fix for a do-it-yourselfer. However the actual fuel pump in the tank was virtually bullet proof. Sending unit was junk, but the pump was good. Now they have one unit doing both jobs, it's electric and it's sittin right next to this hot a** engine.

We shall see. Time and miles will show if it is good.

 

Mymaur,

I hate to keep harping on this, but there wasn't a pump in the tank on the ISB's, either. They also used an electric pump, mounted just before the fuel filter canister, to feed fuel to the VP44 injection pump. In fact, this pump WAS rather unreliable, and was the primary cause of VP44 failure.

If you want, I'll post a scan of the '99 FSM that states this. The first sentence in the paragraph under 'Fuel Tank Module' states, "An electric fuel pump is NOT USED in the fuel tank module for diesel-powered engines."

 

mymaur - you're thinking of (or reading, perhaps?) of the gasoline delivery system. My shop manual only lists a lift pump attached to the filter assembly which provides fuel to the injection pump:

FUEL TANK MODULE
DESCRIPTION
An electric fuel pump is not used in the fuel tank
module for diesel powered engines. Fuel is supplied
by the engine mounted fuel transfer (lift) pump.

There's also not just one pump in these systems, but 3. Well, OK, 2, but the injection pump appears to have 2 stages:

Fuel enters the system from the electric fuel transfer
(lift) pump, which is attached to the fuel filter
assembly. Fuel is forced through the fuel filter element
and then enters the Fuel Pump/Gear Pump,
which is attached to the rear of the fuel injection
pump. The Fuel Pump/Gear Pump is a low-pressure
pump and produce pressures ranging from 551.5 kpa
(80 psi) to 1241 kpa (180) psi. Fuel then enters the
fuel injection pump. Low pressure fuel is then supplied
to the FCA (Fuel Control Actuator).
----------------(fuel return description)----------
Fuel entering the injection pump is pressurized to
between 300 - 1600 bar by three radial pumping
chambers. The pressurized fuel is then supplied to
the fuel rail.

Not sure why they use and keep switching between bars, kpa and psi. Kinda confusing. Anyway, there you have it.

 

I know that it has been beaten to death here, but just in case there is someone out there that is not convinced by the service manual, I can attest that there is no pump in the tank because I have removed my tank and opened it up. There is no pump in there. I took the tank off to see if the vent tube extended into the tank like it apparently does on the new Fords. (It doesn't)

 

Nevada, and old Fords.
Still painfully slow filling my two tanks.
Soon to be ordering a CTD.

 

Had the dealer replace sending unit Twice,first time stuck bad wouldn't move off full, second time said 1/4 tank went a few more miles then light came on and guage fell below empty never ran out though.

 

One more thing, mechanical lift pumps work just fine without a tank pump. I can attest that all three vehicles in my sig use mechanical lift pumps without tank pumps.