Ignition problem?

I have a 97 Intrepid 3.5L and the car keeps loosing power and stumbling. I got a code 353 which is the Ignition coil #3 primary circuit. My wife had it in two different shops and they both told her it was the coil pack going bad. I replaced it, but it still has the same problem. Anyone have any ideas?

just a thought, check the spark plug and see what condition it is.

just a thought, check the spark plug and see what condition it is.
might want to consider replacing the wires as well.....

I may be wrong, but the Plug Wire connections of the coil is the "secondary" circuit, the "primary" circuit is the positive and negative wires going to the coil, check the wiring going to coil #3 you might have a break or bad connector.