About a month ago my car started cranking but not starting. After letting it sit a week I got it started and then it started misfiring in cylinder 6 so I shut it off and it wouldn’t turn back on just crank.

I changed all 6 spark plugs but still same issue no start. Ended up replacing the fuel pump assuming fuel wasn’t getting to the injectors. The car finally started again with no issues and I test drove it for about 30 minutes until it started misfiring.

Drove home immediately and codes are P0300 random/multiple misfire, P0301 cylinder 1 misfire, P0304 cylinder 4 misfire.

Not sure what the issue is now after replacing fuel pump and changing the spark plugs.