Sergio del Castillo wrote:
HI fellow forum members.
I started planning my project for the installation of an in-tank fuel pump. Because of my limited working space and being expose to the weather, my project will be executed as follows:
A.- Obtain the pump (Order placed already)
B.- Get a fuel tank and the wiring harness from a doner at the boneyard. (located one in FL.)
C.- Modify the harness and clean the tank and install the pump. (*hard time getting the correct terminals for the connectors in small quantities)
D.- Remove the harness from my CRD and install the modified harness. (one Week end)
E.- Remove the tank from the CRD and install the tank with the pump in it. (another week end)
Hopeful this could be accomplished during this summer/fall time and weather permitting.
Now my question to you members that have done the installation before. What will be controlling the operation of the in-tank fuel pump?
I have spent several hours looking through the pages of the factory manual and I can't find a clear response to my question. It is clear in the manual how the fuel pump in the gas motor model is connected and controlled, but for what I could gather, the source of power for the pump in the diesel model will be through the fuse and relay that feeds and controls the fuel heater. That means that the in-tank fuel pump will work in sync with the fuel heater, Is this correct, and if so is it desirable? Is the fuse large enough?
Have any body have an answer? Thanks.
*You can get the necessary terminals individually and in any quantity you desire from Mouser Electronics:
Wire Terminals: APEX 2.8MM
male, 14-16 gauge wire
female, 14-16 gauge wire
https://www.mouser.com/Connectors/Autom ... bwZ1z1414hPerform Items "D & E" at the same time! It takes very little time to install the harness once you get the fuel tank dropped. It is basically plug&play if you have the new harness in hand. You can also remove the lower part of the back seat and get the carpet up on the drivers side in advance to allow access the plugin connector in that location.
As to 12v power, the CRD is already completely wired with all the necessary wiring, relay, and logic in the ECM to operate the intank fuel pump. The OEM wiring terminates in the connector under the rear seat as described above, so all you have to add is the wires from this connector to the top of the fuel tank.
The ECM totally controls operation of the fuel pump via the relay and the ignition switch.
When you turn the ign switch to the run position (power on) it will energize the fuel pump relay for ~15 seconds to charge up and pressurize the system, Then when you start the engine, the ECM will energize the relay and the fuel pump will run continuously while the engine is in operation. When you switch the engine OFF, the ECM will de-energize the fuel pump relay at the same instant.
View this intank fuel pump and wiring harness install guide, it covers the install in good detail! >
http://www.auerbach.ca/kj/lift_pump/Not necessary to change the fuse, it is already rated for the fuel pump, fuse no. 24, 20 amps.
Have installed a couple of the intank fuel pumps including my own CRD and have never changed anything other than adding the wiring and fuel tank module....
_________________
Supporting Vendor and Moderator of LOST05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount98 Dodge Cummins 24 Valve