p0300 is multiple cylinder misfire...i had the same thing. swapped the coil and plugs before i realised it was bad wires. if your miles are up there on the wires, sure as sh*t thats the problem. my magnecors only lasted 40k

i have dopepopes number but hes hard to get a hold of and this is short notice. i will pm them both and hopefully see you guys there.
my car should be in this week sometime and i will post about the BBQ date possibilities.