What causes misfire 302, 304 and 306
the gun powder ispacked to tightly and the preassure builds up and can cause it to misfire
In general (very loosely) a misfire can be a bad plug, wire or coil.
Time to replace seals, this usually causes misfire.
A misfire will cause flames to come out of the carburettor
Normally a vacuum leak.
Driving to fast
p0302 is cylinder 2 misfire, you need to fix the cause of the misfire. Possible causes are plugs, coils, injectors......
normally the coil pack