Stalls, loud pinging at all speeds, loss of power, PO302, PO303,

My car was running perfectly today. I had excellent power. I then
turned off the motor for a few minutes, and when I went to restart it,
I heard this aweful pinging noise from my motor and it was tough to
start my car and keep it running.

After turning my car over for 20 seconds, it finally starts, but then
I still have a loss of power, and a continuous loud pinging noise at
all speeds, and if I let it idle it will stall.

Sometimes it sounds real bad.

Does anyone have any clues on what I should check?

Over the past few months, about once a week when I went to start my
car, it would run rough for the first few minutes and then the problem
would go away.

It is almost as if two of my cylinders are not working.

When I checked the codes, it reported misfires on three cylinders:
PO302, PO303, PO304.

When I checked one of the spark plugs that was misfiring, it was
totally wet with gasoline. This was after driving 10 minutes to get
home.