ok so, for a couple weeks car has been misfiring and getting progressively worse. i went through a series of diagnostic tests and replacing certain components as test showed needed. engine light came on and code was P0300...engine misfire lol...no kidding. well turns out, it was the spark plugs taking a ****. who would have thunk it.

i tried out these new E3 plugs. they lasted less than 6 months. so i put the copper NGKs back in today and problem solved. anyone thinking of trying the E3s i would highly discourage.

i am interested in the new pulstar plugs if anyone has any data or opinions or experience with them.

i just want to thank you guys here in at the cobalt ss network. i did some research and found similar problems and how spark plugs had gone bad. keep up the good work.