I am having a problem with a misfire situation. I keep getting P0300 and P0301 codes. The odd part is this only happens when there is more than 1/8 of a tank of fuel. Also the misfire goes away for the first 20 or so kilometers after putting gas in it. I have had diagnostics run on the O2 sensors and they are all fine. The spark plugs and coils have been replaced. The crankshaft position sensor has been replaced. I replaced an injector that had a leaking O ring. I also get a P0456 code every once in a while, but not as often as the other codes. I replaced the gas cap as well, but this problem did not go away. Any thoughts?

 

I have the same problem, you could solve it???