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I bought my ls430 about 6 weeks ago, I noticed when I got it the throttle response was terrible. I reset the ecu and it improved some but was still pretty poor.
My first tank with the car I got 20 MPG city (NYC City) with marginal throttle response
Maybe 5 Tanks later my throttle response is much much better and my last tank was 16 MPG
I turned of the power setting and I will see how this tank stacks up
I read that the car learns and adapts changing the throttle response to suit the drive but I didnt beleive it. I guess I was wrong..
I've had my car on the 'power' setting for the throttle and A/T for the last few months. Response is noticeably sharper,and the fuel economy is actually slightly better than on the 'economy' setting,contrary to what I expected.