O2 sensor at WOT Dyno
I took the car for a dyno run on Saturday and the tech suggested to disconnect Fitech's O2 sensor and he connected the Dyno's O2 sensor. We couldn't finish the run because it went very lean at 13.7. My question is, was it good idea to disconnect the O2 sensor for a dyno session?
I would say a very bad idea. You should use the O2 sensor for the FITech. Will also need a length of pipe "behind" the sensor as it will "pull" air back into the exhaust at idle. Learned this with my exhaust cutouts the hard way.
Agreed, very bad idea and you may have to reset the tuning that the computer learned or revert to a recent tune file if you had saved your tune file recently. Is it running fine when you hooked up your O2 Sensor back?
I agree. It was not a good idea and I can't believe I let it happen. The system is working great with the O2 sensor back. I don't think it will reset the tune just by unplugging it. Logs at WOT show the AFR target at 12.4, with actual between 12.2 and 12.8.