I?m wanting to be able to have more control of the engine in my 2004 Saturn Ion. I?m aware it has the E16a PCM that?s not tunable, my thoughts are to run a P11 PCM in a dual PCM setup, leaving the E16a with just enough information so that it communicates with the BCM and runs the gauge cluster and power steering and all that. I can?t find any straight answers on this matter however, due to most tuners not liking the P11. Any help/insights?