Hello, I have a 2000 WS6 with 35k miles pulling DTC codes PO352 and PO354. I swapped the B coil pack with the A coil pack and it still pulls the same codes. When I clear the codes, they come back fairly quick. Lastly while driving the car is very sluggish and has a noticable miss and the headers for the #2 and #4 cylnders are fairly cool. Any thoughts as to what is causing the issue? Thank you!!