You need to make sure that you are on the correct code, so plz check it, dont half *** it, and then post it, if you are actually looking for help to fix this issue.
because no one will help you with what you have typed in.
with p0300 its simple try MAF cleaner first, then reset the car by disconnecting the batt. for 10 min, if the code comes back then its the coil pack, or spark plugs most likely.
Also there might be a code on which cylinder its missfiring.
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Kids don't do Drugs, Drugs are bad, so let the professional druggies do Drugs for you.  537whp/496lb/tq@8-9PSI 93 octane
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