I have a 2002 x model jaguar, has missfire at 2 4 6 and no vac leak, no bad gas, check coils, anyone had this issue? help a brother out here,

 

You must tell us the engine size and codes and mileage if you can otherwise were guessing.Could be anything from a broken wire to bad head gasket. On a 2.5 2-4-6 are closest to the radiator and easily accessed without removing the intake plenum, usually there isn't multiple misfires on one side unless a common problem is there. I would pull the plugs and do a compression test first checking each plug condition then ohm out each coil pack, check the wiring to the injectors then a fuel pressure test. Nothing major until I do the easy stuff, throw in three new plugs and see if the problem lessens.

 

I had a similar problem with the rear bank, back pressure from a clogged cat caused the miss-fire. My mechanic had me pull the upper O2 sensor, left it plugged in electrically and drive it around the neighborhood, car ran great which confirmed that it was the cat.
HTHs
Gary