2000 Sephia Misfire Cyl. #2

[PontiacVent1]

I am currently working on a 2000 Kia sephia with a 1.8L automatic transmission. The car has a cylinder 2 misfire only when cold. The plugs, coils, wires, coil boots, injectors, airfilter, fuel filter were all replaced. Checked to ensure stable injector pulse and spark were present and were. Tried to access data through snap-on modis scanner and it will not communicate. Was able to pull up codes (P0302) but no data. So i cannot access any data stream from the car. Checked with propane and carb cleaner around the intake gaskets for a possible intake leak and no apparent changes were noticed. If anyone has anyother suggestions please the help would be greatly appreciated. I am stumped. Thanks.
-Jeff

Also left out that i used the motorvac machine on the fuel system and disconected the maf to see if there was a differance in the way it ran and it missed both ways plugged in and unplugged.

[kiaracer]

possible causes of a P0302:

1)Vacuum leak in air intake system.
2)Crank Position (CKP) Sensor circuit malfunction.
3)Faulty CKP Sensor.
4)Ignition circuit malfunction.
5)Faulty ignition coil or plug wire.
6)Spark plug malfunction.
7)Low compression due to blown head gasket, leaking valve(s) or piston ring(s).
8)Low/high fuel pressure due to faulty pressure regulator, restricted fuel lines, plugged fuel filter or faulty fuel pump.
9)Fuel injector circuit malfunction.
10)Faulty fuel injector.

[Strangerous]

Myself, I had the vacuum leak in the intake. My issue was with the coupler between the inlet housing on top of the radiator and the air box. Over time, repeated heating and cooling and dry conditions made the rubber coupler itself expanded to the point of being loose. I could wiggle it back and forth, and turn it with no effort. It was creating a huge air leak, and I'm happy I caught it... I just replaced the air filer the previous weekend, and didn't may the coupler any attention. I used my super secret magic tool that fixes just about everything that ails a machine...

The misfire codes have not been back (about 2 weeks since I fixed it).
This forum has a lot more information than I originally thought it did.