last month I posted that my OBD 1 fault code came up 222 which is loss ofd signal to right bank. I swapped out both coil packs and cleared the fault codes. the next KOEO showed 111 or system good. I started my truck and did a KOER the engine ran good for about 15 seconds then started acting funny again. I received the 222 code again and also a 998 code or running in failure mode code. does this code mean the ECM has failed and needs replaced. Any help would be greatly appreciated at this juncture. thank you