Random misfire on even # cylinders

I was coming home the other night and suddenly lost power I stopped and looked under the hood couldn't find anything obvious this went on for about 15,20 miles then she picked back up power when I got home the next day I got a thing from online to read codes and got po300,po302,po304,po306,po308 which is random misfire on left side of motor I've switched coil packs ,plugs,inspected and cleaned the crank sensor checked vacum lines I'm out of ideas ,why only the left side I'm so puzzled

 

Possible water contamination in the gas if nothing else. Keep a bottle of dry gas available in case it happens again and gets worse.

 

If it was bad gas I would assume it would hit both sides with random misfires. My guess would be spark plugs or maybe some electrical damage in wiring.. one more thing, maybe a warped head or head gasket allowing coolant ingestion..

 

Could be cam related?

 

How so

 

Cam position sensor on that bank of cylinders? Cam out of time on that bank of cylinders?

 

You may have a cylinder that’s misfiring and dragging the others on that bank down with it. Compression test before going too far on anything else just to rule out compression loss (which I doubt) you may have an injector issue

 

There is only one cam sensor on the 4.7 if I remember correctly. On the driver side cam

 

More than likely a stuck o2 sensor, if stuck rich it will lean the affected cylinders. Vice versa if stuck lean. O2 sensors are on each bank, therefore causing all even cylinders to show misfires.

 

Could be getting ready to toss the timing belt...when was it last changed?