xdrill

I have a gen5 ss ls1 (I think, J series vin) I have a #3 misfire but can't seem to find the problem, new coils, rotated plus and wires, cleaned and rotated injectors, did continuity on the coils coil wiring and sparkplug wires, still have the misfire, tried to check compression but dropped the tools and haven't been able to get another compression gauge yet. What I'm looking for is any advice I can get and a wiring diagram for the ignition. Can Anybody help?????