My girlfriend had the same problem. I did a full tune-up. PCV valve and all. That didn't help. It's good to do but didn't solve the problem. I then had the tranny flushed. WOW!! What a difference. The fluid that was in there was no good and was causing the valves in the tranny to stick = no power. I would highly recommend this. When I checked the fluid before it didn't seem to bad but it was. I was all ready to change the gearing in it. Luckily I tried this first.
![Thumbs Up :thumbs:](https://board.marlincrawler.com/Smileys/marlin/thumbs.gif)
It also helped out the mileage. Don't expect to much out of an automatic. Weakest part Toyota ever put out.