My IS350 has definitely lost power. I thought that it was bad gas, but now that I'm running a new tank, the car is still sluggish. Both myself and my g/f have a noticed it when we're at speed and want to pass somebody or just gun it. Any advice....has anybody else noticed this? FWIW, my car is a 2006 with about 14K on the odometer.

 

Have you tried getting the ECU reset?

Is it the throttle response or the transmission?

 

Some people have said the ECU learns your driving style in the first 1,000 miles only. However, I don't think that's true. My 250 has always felt pretty peppy to me. But about a month ago I got really sick and I was driving slower. When I started feeling better I began accelerating faster again, but my car felt sluggish. It took a few days, but I can feel the power has returned to my car. By the way, I drive with power mode turned off as the car usually feels like it's in power mode already, shifting at about 3,500-4,000 rpm. When I was sick it was shifting around 2,500-3,000 rpm.

 

yea definitl.y reset the ECU. I reset every couple of months and im surprised everytime i reset.... I am hoping that one time when i reset it turns into a IS350 AWD... ahaha doubtful

 

Turn on power mode and see if it makes the throttle reacts quicker. If it does, it's because the ecu got accustomed to your normal driving behavior.

 

how to reset the ECU?

 

Disconnect one of the battery terminal.

 

We always leave the power button on (it feels more responsive to me at low speeds and RPM with the power button on). It has been living at the airport lately and has only been driven to/from the airport for the last month or two, so I'll try resetting the ECU.

 

Thanks for the help. I reset the ECU and all is well again.