2002 kia sedona 3.5l has rough idle replaced plugs wires and coil

Likely an improper air/fuel mixture. You need know the fuel trim values plus multiple inputs e.g. MAF, temp, fuel pressure, up/downstream O2s, etc. As it appears bank related, look for bank related vacuum leak, O2, or cat.

Question edited for clarity.
Question moved to sub category.

P0304 is only a misfire error to cylinder 4.

https://www.700r4transmissionhq.com/p0304-kia-sedona/

There isn't a 'fuel control module'.

https://www.google.com/search?q=2005+Kia+Sedona+2EX+3.5+Fuel+control+module

But there is a fuel pressure regulator

https://www.google.com/search?q=2005+kia+sedona+fuel+pressure+regulator+location

When you look up fuel 'module', you come back to the fuel pump.

https://www.google.com/search?q=2005+kia+sedona+fuel+module+location

One thing you might try is moving coil pack 4 to another cylinder and see if the code moves. After that do a plug swap and see if it moves. Do them separately not coil and plug together..
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easyautodiagnostics.com > Ford > 2.3L

Mar 1, 2012 - Spark plugs for cylinders #2 and #3 get spark at the exact same time. ...voltage -12 Volts) to both individual ignition coils within the coil pack. ... Ford Mustang or Ranger (or 2.3L Mazda B2300), this is what you'll need ... for this 'Switching Signal' at the coil pack... but you can also test this ... 1991, 1992, 1993.

How to Diagnose a Misfiring Cylinder (2.3L Ford Ranger ...

troubleshootmyvehicle.com > Ford > 2.3L

Apr 3, 2012 - Bad Fuel Injectors can cause a Misfire Condition. ... the ignition system on the 2.3L Ford Mustang or Ranger consists of 2 ignition coil packs, ...

2002 ranger misfire rough idle - Discussion on Topix

www.topix.com > Ford Ranger

Jul 27, 2007 - My truck is giving the code misfire in number 4 cyl. I replaced my spark plugs, Wires, Coil packs (both of them) and all my fuil ... three (3.0L v6) go bad, the fuel/air mixture gets messed up. Judged: 2. 2 ... My truck runs rough only at idle. ...code for ford ranger 2002, 2.3 5speed. truck runs like a champ but that ...

Extremely stumped! I need the best and brightest 1994 Ford ...

answers.edmunds.com > Edmunds Answers

having PO 304 = Misfire cylinder 4,PO 306 = Misfire cylinder 6, as I read above you have done the most. The thing that you have missed is to check whether the Catalytic Converter is faulty or not. To get an idea check whether you have a smell like rotten eggs at the end of the exhaust,you start having problems with cat and needs replacement. My advice before you go for a cat replacement is good to visit an MOT center and check your emissions and then you decide,

Check on intake silicon gaskets, upper and lower. About $18 at autozone

Fire it up at night and look for arcing in the dark. It may also be nothing more than number 1 plug wire misrouted in a way that inductively picks up energy from one of the other coil packs or cylinders. It should cross other plug wires only once.

The problems could be that a plug was not gapped correctly or needed to be gapped and was not. Easily the best thing to do would be to remove it and check it to see. Visit your local Autozone as well and have the codes read, if there is indead a misfire, there should be a code that will tell you in which cylinder exactly the misfire may be coming from. If the spark plugs are not causing the problem, then you can retrace you'r steps and check the plug wires or coil.

Hope This Helps!

Sounds like the ignition wires,from the coilpack to the plug,or the coilpack itself

How many miles on the plugs and wires? Misfire can be caused by either plugs or wires, after that check the injector for that cylinder. Let me know what u find. Curt