had very rough idle and threw code p0351. bought new coil and installed over plug for A position. still not fixed. not getting spark on ignition coil (left rear/passenger side when standing in front of engine row of plugs). idle changes when all other coils are unplugged from system except A position (new coil).
I have no idea what to check next -------- car has 90000 miles and plug to coil does not show signs of burnt contacts.