[ever_green]

I did an ECU flash on my car and adjusted the Drive By Wire settings. I basically made the throttle slightly more sensitive. This way I have to press the accelerator pedal less to get going and it makes the transmission think i'm just cruising and it causes extreme short shifts and Torque converter locks. By extreme I mean the car mostly operates at 1200-1700 RPM range now. Whats more is if i'm not in hypermiling mood I just select sports mode and that adds ~1000 RPM to the shift points.

Was it worth the trouble and risk? No. Did I get any considerable improvements in mileage? No. in fact my mileage did not change at all. Whether you generate 40 HP at 2000 RPM or at 3000 RPM don't really matter much these days, at least not with my car...so long as you don't go to extremes.

the biggest effect on Fuel economy in terms of mods is closed loop and open loop fueling. Running lean REALLY REALLY helps. I improved my mileage by about 10% when changing the unnecessarily rich fuel maps. I'm not really sure why manufacturers are making fuel maps richer and richer every year. i guess it has to do with higher compression, timing and output. Eitherway this can be fixed by running leaner and cutting a couple degress of timing for safety under load. I prefer the Lean and moderate timing strategy compared to the pig rich and mean timing.

my fueling is completely vacuum/load based now and I can run as lean as 15:1 at 4000 RPM if there is enough vacuum!