96 XJR P1313 code

Car drives great. intermittent misfires causes CEL to come on. Coils, plugs changed. What am I missing?

Well if you used, good coils, correct plugs and the throttle body is clean.

Check the ground and harness on the drivers side of the transmission.
They rust up and rot away.
Once you see it you wont miss it.
Clean it up and try.
good luck!