2004 Infiniti G35

Shakes or Wobbles problem
2004 Infiniti G35 6 cyl Automatic 65,000 miles

I have a code p0300 on my g35, I have changed the coil packs, spark plugs, and also the catalytic converters, I have asked around to see why this code is still there but nobody knows, what would be my next step since it still missfires, and whatever it is, is burning my driver side catalytic converter.
April 14, 2009.

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