Your CRD didn't come with a fuel pump in the tank but it helps to add one. Jeep's original plan was to put one in but they didn't as a cost saving measure. There is already a circuit in your Jeep for the in tank pump. It includes a fuse and relay with wiring that ends under the left rear seat. An additional bit of wiring harness is needed to go between the connection under the seat and the pump. This harness piece can come from a Jeep Liberty/Cherokee but it needs to be modified. Export Libertys/Cherokees might have an access panel above the fuel tank in the cargo area. No access panel in US versions, the tank has to be dropped.
The fuel line quick-connectors are designed to seal under pressure. Without the in-tank pump air gets sucked into the fuel lines at the connectors causing no-start or stumbling problems. You can bleed air out of the system using the pump and bleed *s*c*rew* at the fuel filter under the hood. US and export fuel filters are different but there should be a pump and bleed ***** on both.
Sasquatch makes a kit with everything needed but it's expensive. The LOSTJEEPS forum has a lot of information on this CRD problem and others.
Fuel pumps:
* Dodge 3500 Cummins #5143160AA
* Airtex #E7181M
* Spectra Premium #SP7181
Terminals:
* Apex 2.8mm terminals
female #54001800 (2 needed)
male #54001801 (1 needed)
tool #5400
More info available here: