Phantom, this is actually already on my "to do" list ill be testing when my car is in open loop then ill disconnect the o2 sensor and see if i can force open loop. This was as a separate investigation to the 2 cylinder mod as id like to try out lean burn on my standard 4 cylinder. Either way if i can force open loop operation it might make cylinder deactivation easier. It may also make the car very unreliable maybe
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