The Dodge Cummins used two different pumps, depending on the year
- 03-04 used an external pump mounted to the filter manager on the engine, supplying ~11psi @ 10a max - it is a draw-type
- 05-06 used an in-tank version, unknown pressure, 5a maximum, simply stating that output would always be more than demand, and that the COV would return excess fuel to the tank - it is a push-type =
Here is the very informative blurb from the very helpful $180 DCX manual (helps them send their kids to college) -
Maximum current flow to the pump is 5 amperes.
With the engine running, the pump has a 100 percent duty-cycle.
The transfer pump is self-priming: When the key is first turned on (without cranking engine), the pump will operate
for approximately 2 seconds and then shut off (Note: When ambient temperatures are cold enough to cause the
intake air heaters to operate, the fuel lift pump will operate during the entire intake air pre-heat cycle). The pump will
also operate for up to 25 seconds after the starter is engaged, and then disengaged and the engine is not running.
The pump shuts off immediately if the key is on and the engine stops running.
The fuel volume of the transfer pump will always provide more fuel than the fuel injection pump requires. Excess
fuel is returned from the injection pump through an overflow valve, and then back to the fuel tank.
Here's the oem info site, incl poopsheets
http://www.airtexproducts.com/
From DCX -
The '06 3.7 tank module with fuel pump is ~190bucks online
The '06 Cummins tank module with fuel pump is ~168bucks online
Modules and pumps not serviced separately
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