I have an 05 TB with 82K. Scaned it today cause I have been having misfires at idle and could feel it. Now when I drive it is sluggish until over 4k rpm. You can feel the motor be sluggish and then drives like normal, then sluggish again. I know the P0410 code is my secondary injection valve and have ordered a new one since mine is stuck closed. But the P0300 random misfire is killing me. I have bosch platnium plugs and someone said that they are to hot for the I6. I will change those to AC Delco's. But does anyone else have any ideas.