I have a 2004 Pacifica with a 3.5 L engine. The problem I have is at road speed (45-55 mph) the engine looses power, randomly. No warning lights come on, but the tachometer drops from 2000 rpm down to between 500 - 1000 rpm. Increasing pressure on the accelerator does not help for at least 30 seconds then it comes up to normal rpm's.

Could this be a fuel filter problem? Any help would be appreciated.