P0300 & p0301

[BYprodriver]

Started my 2000 Boxster S after changing sparkplugs & CEL comes on, scan shows P0300 & P0301 #1 cyl. so I swap plugs & coils with cyl.# 3 with no change still misfiring & same codes.

Any ideas??

[Root_Werks]

What plugs are you using?

Double, tripple sure you didn't crack the plug when you installed it?

[BYprodriver]

Yeah that was the first thing I checked since thats the only part that changed(Bosch 4 electrodes) turned out to be poor spark lead connection on #1 cyl.