Hey scotty, Have a 2004 chrysler pacifica. When driving highway speeds, the vehicle wont go pass 80mph and the biggest problem the rpms high 4000 to 5000 and hold there. its not shifting gears normally. what could be the issue. Beside the car a P.O.S. Below a listed of parts i replaced withall mopar parts.and still seem to have the same problem

Replaced spark plugs, coils, throttle sensor, iac sensor, knock sensor, cam and crank sensor, pvc valve, egr valve.. I dont have any obd codes on.