P0101 MAF circuit range performance problem P0300 Random misfire
Do a MAF cleaning when ever you clean you K& N airfilter . Fuel pressure should be looked into. when the fuel pressure is low than the manufacture you can set a P0101 with a P0300.
Also check the fuel pressure regulator at the vacuum hose connection for any fuel that may be seeping out, with the engine running and vacuum hose removed if it is replace the fuel pressure regulator
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