P0301 (cylinder 1 misfire) after driving through water.

What is your question?

My 2013 Chevrolet Spark is having a misfire issue ever since running it through water. I have replaced the spark plugs and Mass Air Flow Sensor. I have also tested the coil packs. Once I replaced the Mass Air Flow Sensor my check engine light went off, but misfire stayed. OBD II reader is giving me a P0007 code now which is Fuel Shutoff Valve circuit high. I am unsure what else to check other than fuel injectors maybe. Some insight would be much appreciated.

How long has your 2013 Chevrolet Spark had this problem?

A week