2004 4.2l ford freestar Engine shutters and hesitates?

I believe its the ignition coil.

Need a little more than that is it when its cool or hot. Does your rpms increase and decrease at idle etc....

while driving, hot or cold, the engine hesitates. RPM's don't drop and it only does it every now and again. After it hesitates, it goes on like there is no problem.

Check exhaust compression. Remove O2 sensor before the cataylatic converter and see if the hestiation stops. If it improves then the cats are clogged.