V6 engine misfire
Possible coil pack or broken insulator on a plug. If it seems fine at idle, replace the coil pack. It should be easy to get one, your motor is shared with FORD.
Thanks. I have changed plugs, leads and coils. Runs fine but regular misfire under full power which hints at clearing.
Search Jaguar S-TYPE Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Jaguar S-TYPE Experts