I just got my car back after having it swapped for b18c4. The problem is that i only have one key, its the orginal Ek4 key with a transponder in it. I picked a p28 ecu to avoid the whole immobolizer problem, but the IMM system still works perfect. My new keys dont start the engine, if i remove the transponder from my old key it still wount fire. So the question, is the IMM still 100% while running a p28 ECU?