Misfire Code p0300

HttpRyxn

Hello, I am new to this forum site and I've been looking for help with my misfire code P0300 which has been a pain In the ***, I bought my first 2009 370z Last month from the Honda dealership I work at and 4 days After I bought it, It has an engine code for misfires so immediately I thought I got sold a car with a bad engine. Long story short Please to god do not go to a Nissan dealership, I had my techs at Honda work on my car and they knew more about it then Nissan (and they know pretty little). I was looking on the forums too see how I could fix it, At first we cleaned mass air flow sensors, and the throttle bottle and cleaned other stuff too, But after the code was cleared 40 miles the code reset. This happened for 1-2 months before we started to throwing parts into it because Honda Is cheap and didn't want to fix the broken car they sold me! so first we replaced all 6 spark plugs and code still came back on, after that I was told to bring It to a Nissan dealership down the street, So I bring It to them and they get their "370z Expert" after a week of taking my whole intake and engine apart, they said I had debris in my fuel rails and cleaned and had no stored code. But yet again the code came back on but this time I only drove 15 miles back home from the dealer! At this time I was so mad because they had my car for a week and still couldn't tell me why I was getting misfires, So this is when I looked on the forum for some rare issue and I saw some people where the flywheel would cause excessive vibration and would cause a misfire, So I tell Nissan that this cold be the problem and they say yeah maybe It is???? wtf do you mean maybe it Is ? After 2 weeks of waiting on a the only flywheel brand new oem in the us from flordia, I replaced the everything on the clutch because why not and also Because Honda was paying for everything lmao. It's been a couple of days and I have drove well over 100 miles and Fingers crossed but no engine light yet. So I guess if you tried everything to fix a misfire, you should check the flywheel to see if the spokes are chipped, and to see If you need a new CKP sensor, which seemed to fix my misfire. Keep In mind my car Is 2009 and only has 49K miles, I know still a lot but I think it's pretty low. Also before replacing the whole clutch and stuff we tried everything else that Nissan said would fix it.