My 1986.5 D21 w/ VG30i engine is running rough. Just put in a used long block from Japan, had the heads done, new wire, plugs, cap, rotor, coil and ignition control module (power transistor). It starts but idles rough and stumbles during acceleration. I put a timing light on each plug wire when running and notice inconsistent spark. Seems ok at idle but at speed there is a miss on each plug wire. Doesn't idle smooth either, speed varies. I can't figure this one out and am ready to take it to a shop for diagnosis and more pain. Any help is appreciated. Thanks!