Air build up in the fuel head issues can be eliminated by installing a in tank lift pump
Our whole fuel system from the tank to the CP3 pump is under a vacuum. A vacuum system can work perfectly but our CRD's have a couple of things working against it,
First our fuel lines from the filter rearward are from a gasoline version and they run a pressurized system and the plastic fittings at the tank are often the source of the air leaks.
Second the fuel head is the highest point in the system so air is trapped there and under certain conditions can rush to the pump and cause driveabilty problems
Chrysler has done the hard part of installing a in tank lift pump by putting all the control circuitry and wiring all the way to under the rear seat just waiting for you to finish the job.
You can mount a lift fuel pump just about anyplace as many have but if the pump is sitting in fuel inside the fuel tank it's pretty hard for it to "suck air"
Yes it will take some effort and time, a couple of hours, to drop and then re-install the fuel tank but you can forget about it then
It also makes it very easy to reprime the system when you replace the filter
See the currently resurrected thread titled "It's 10 o'clock, where's your lift pump" for details.
Not everyone is cursed with this problem but if your one of the unlucky ones you'll be very pleased how well your CRD will run with one
