Journeymen good day.

This 03 Cavalier 2.2 eco engine codes p0300. I found the #1 & 4 plugs fouled. (Bosch Platinum 4s, ugh) Compression 160-175, new AC Iridiums. Of course still codes p0300. I'm sure the 1/3 coil isn't delivering much. Cyl 4 more fouled ... Login to read more.