Coil packs come in a tower configuration with two adjacent coil towers sharing a common coil (and called a matched pair).

For 4 cylinder applications, the matched pairs are 1 and 4, and 2 and 3.

For 6 cylinder applications, the matched pairs are 1 and 5, 2 and 6, and 3 and 4.

When the coil is fired by the PCM, spark is delivered to a matched pair of towers to their respective spark plugs.

The spark plugs are fired simultaneously and are paired so that as one fires on the compression stroke, the other spark plug fires on the exhaust stroke.

The next time the coil is fired, the situation is reversed with the next pair of spark plugs being fired according to the engine firing order.

Start by checking for at least 10 volts at #1 coil connector wire that is White with Violet stripe. If you do have that voltage Next  is asking if P0351 or P0356 has been stored which it has, then check the crankshaft position sensor down at the crankshaft pulley. Disconnect connector and sensor should have a resistance of 290-390 ohms. If that checks ok then wants you to hook a 12 volt test light across both wires at the #1 coil. Crank engine and make sure light blinks consistently. This would be checking the integrity of the circuit to the PCM.
One thing you also might want to try before any of this is to make sure that the electrical connection at the coil connector are ok. If the pin fit is poor then you would not get a good electrical connection. Might even try getting a very small pair of needle nose pliers and twist the connector pins at the coil itself just slightly. If pin fit is a bit loose then twisting the pin just slightly will give a tighter connection. Hope some of this is helpful and that something out of it works for you.