XJR needs help!!
 

Hello guys, recently my 1998 XJR had a new fuel pump installed, but a check engine light with code 0302 was detected, which was misfire in cylinder 02. I really appreciate any technical advice I get on this trouble code.
thx

Most commonly it is the direct ignition coil that has failed. Are your valve cover gaskets leaking?

Clear the code, swap the coil for cylinder #2 with another coil, drive the car until the check engine light comes back on and check if the code followed the coil.

That is a very easy way to tell if the problem is due to a coil.