| Both on different cylinders? All the coil packs share a two ground points (one body, one engine). All the injectors share one power supply (relay box) and ground through ECU. I would start by double checking your grounds are clean, maybe install a couple extra ground wires between the engine, body, and battery.
------------------------------------------------------------------ 1992 300ZX NA 5 Sp (Dead) 1990 300ZX NA Auto 2+2 (Dead) 1990 300ZX TT 5 Sp (Building) 2004 G35 Sport 6MT (DD) |