Hi, I have a 2002 Lexus IS300 Auto, V6 3.0 Engine. I started having a problem two ago sometime when I press my pedal it stiff sometime. I noticed the MPG went up to 80 and my temperature moving up to HOT. If I let go my pedal than the MPG become normal. I bring to a mechanic he already change transmission fluid and flush for me too, which still got the same issue. He told me that I need to bring to lexus dealer to reset called" ECG" not sure and it should fix. Did anyone have this problem before? Your feedback is appreciated.

 

Never have that kind of problem. You should really bring ur car to dealer, and don't wait.
not a side not, your name sounds like a Cambodian name. just wonder