Please help 2000 Sebring running rough

I have a 2000 Chrysler Sebring that was running rough and I changed all the plugs, wires, got a whole new distributor, coil, cap and rotor and it's still running like crap...the check engine light is not on and the computer gives no codes...any ideas?

Aconcepcion77, have you cleaned the throttle plate, ran any fuel cleaner through it lately? Have you checked for vacuum leaks? Changed the fuel filter? What engine do you have? How many miles? Do you keep up with maintenance? Assuming ther is no internal engine damage like a burnt valve etc. this is where I would start, also don't forget about the 02 sensor. Good luck.