02-09 Vortec 4.2L I-6 Engine and Drivetrain
Had a P0302 reading on my ‘02 4.2. Replaced #2 coil and all spark plugs. Plug in #2 was definitely darker but not wet. Reset computer. Now have P0300 and a more noticeable miss than I did before. Checked each cylinder by pulling coil connection for each cylinder individually. When I pulled...