Ya I had three times up untill the fourth just now. I set the ignition to the red mark, which is standard right?? I took it out for a test drive and the CEL never came back on. Right when I pull back to my house it comes back on, except it was code 23, the knock sensor. I've fawked around with this plug for about 4 months and I hate how it keeps coming back.

This is good news though No misfire in 2,3,4