The 3 common things that would affect ALL coil packs (both banks) are...
PCM fuse #16 underhood (10a).
Ground G106 (located near the starter I believe) and G107 (ring terminal on rear of left head)
Ignition relay 42 (this failing to close should produce a code though).
Fuses #22 (15a - coils bank 1) and #18 (15a - coils bank 2) also worth checking, but both would have to be out to affect both banks.
