Re: Reset ECU. What driving pattern to get most power?
It's obviously odd that the power has dropped since running a reset, but have you troubleshooted this problem from any other angle: ie checked ignition timing, fuel mixtures etc? I once had a similar problem in my previous car (a Nissan Pintara). I was convinced that the problem was to do the with throttle position sensor (registers a 0 - 5v signal to the ecu - just a potentiometer). I replaced it, changed the plugs etc, but to no avail. After reading through the factory Nissan service manual, it turned out the ignition timing was out by about 7 deg. Advanced the timing, and the problem was fixed.
Possibly try a higher octane brew in the tank and reset again? Do these engines run knock sensors?
ED Falcon XR6 - Polynesian Green :)