Ok, Im hoping some knowledgable person can help with a problem with my 2002 LS430 before I end up scrapping it. Vehicle has an intermittent misfire and when it does, the EML comes on and it it runs on 6 cylinders. Did diagnostics and it said random misfire cylinder 5. Checked plugs which were a bit dirty so replace all 8. Cleared codes all was well for a few days, then came back. this time saying cylinder 8. Was told possible coil pack so replaced it and again cleared codes all was well, came back this time cylinder 3 so replaced that coil pack and the rest of them. Again, all fine then came back as cylinder 5 again. was going to swap injector to see if was fault, put diagnostics on again, said cylinder 8. Am at a loss... can anyone suggest what could cause misfire to swapped cylinders. Sometimes the light flashed and it it runs lumpy, other times the light stays on but performance is normal. Any help greatly appreciated!