My suggestion would be to forget the factory, Cummins, etc. lift pump and go with a RASP. The RASP is a mechanical fuel pump whose fuel pressure is dependent on RPM. Therefore, no WOT loss of pressure. I have rock-solid 15 psi all the time, including WOT. You can even "tune" it for the pressure you want. It is a little pricey, but being that you have gone through five lift pumps already, I think that a RASP would a least be worth a look.
there is now an updated kit from dodge to switch to the in-tank fuel pump like the 05's have... i believe the kits is also for the 2nd gen 24v's
I have a FASS II LP that installs near the tank and at idle I have 16-16. 5psi and WOT it drops to 14. . And as soon as you let off the throttle even a little it jumps right up. I love it and its cheaper then the RASP. . Right now that is probably the most reliable system, but then again as far as electric ones goes you don't hear that many complaints on FASS, Airdog... etc
engcogod said:Not trying to start a war or anything but the only 2 disadvantages of the RASP in my own opinion is 1. It is pricey, but after going though that many lift pumps it may be worth it in the long run... 2. You still need somewhat of a good LP to prime the system back up after a filter change or if your RASP would fail (chances are very unlikely) the pressure switch would then kick in the LP so you wouldn't be stranded...