coil on plug testing with multimeter?

[dindy]

i found out that it might be a faulty coil on plug for cel sometime light on and rough idle. but on start on back the car, it goes off and on later on....so i checked for resistance between the pins of the each coils, and found that 3 of my coils resistance is from
pin 1-2 (346)
pin 1-4 (1420)
pin 2-4 (1563)
pin 2-3 (1100) for 3 coils.
But the other is totally different.
pin 1-2 (309)
pin 1-4 (1756)
pin 2-4 (1870)
pin 2-3 (1146) for 1 coil of them

think that is the trouble maker? cel never stands on all time! sometimes it goes on, but as i shut down the car and restart it stays off, but later, specialy in idle in traffic it goes on with rough idle and with no hesistation on driviong normal speed. any help guys?

[CTScott]

The coil pack contains a bit of circuitry, so measuring the resistance of the input pins won't tell you all that much. Have you read the code to see that the DTC is always on the same cylinder?

[Astroman]

Moved thread to correct section.