I have a 99 Jag XK8 and the engine misses only after the engine is hot, it runs good when cold. I changed the plugs and one coil pack and it still misses. Could in be the alternator?

 

Welcome to the forum.

Stop throwing parts at it and either buy an inexpensive code reader or have one of the parts supply stores read the codes. Then bring the actual code here, not the reader interpretation and we will help.

Please visit the new member area and introduce yourself:

New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum