Usnagolfer

Given the history, forum posting history, for the 2001 RX300 if mine had that kind of mileage I'd be overhauling the transaxle. Have you checked the ATF fill level or condition..?? ATF should be mostly clear/transparent and light pink in color. ATF looks great and it is full. No traces of metallic fines or discoloration. With the ignition switched on but no engine start make sure all the instrument panel diagnostic lights/icons illuminate. All warnings lights illuminate. Is there anything to the recommendation of cleaning out the resistors down stream of the air filter?

I have a 2001 RX300 with 128K miles. I am clueless when it comes to automobiles. I am experiencing an acceleration hesitation problem. It happened the first time when I had driven all day looking at real estate. I knew I was low on oil so I stopped, added a quart and the problem went away. Now two months and an oil/filter change later the problem has come back. When the car has been run for about an hour I experience a similar accleration hesitation problem decribed in this forum. No matter what speed I am going 0, 40 or 60 MPH when I accelerate over 2000 RPM I experience a loss of power/acceleration followed by a "sling-shot" move where the power comes back just to go back to sling-shot again. When I pull over and stop and start the car the problem goes away to return an hour later. Any advice?

Is it possible to go from the original version, 2000, to the 7.1 version or does one have to install all the version in between?