Sounds like your getting plenty of fuel.
Looked up P0300, if it said P0301 it would be cylender 1, 0300 means the computer either couldn't locate it, or its jumping arround.
You might check your intake manifold and any attached vaccume lines for leaks.
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Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
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If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
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