Glad I found this. My check engine and VSC warning lights came on yesterday and I started having an issue with loosing acceleration. It ran fine for a few miles and then lost all acceleration, just basically idling. If I push the pedal all the way to the floor, I can get a little bit out of it, but that's it. I turned it off for a few minutes and restarted. The warning lights stayed on but it ran normal for a few miles and then the problem started again. It smelled like something was really hot or burning. I looked under the hood but didn't crawl under the car. I'll check the coils, hopefully that's my problem.
To respond to Freegard - if you're looking for about removing the ECU, try searching for removing the A/C evaporator. You have to pull out the glovebox and everything, and the ECU is right there. I found some step by step instructions for evaporator removal on my car and the ECU was part of that process. The ECU itself is just a couple screws and a bunch of wiring harnesses once you get to it. Here's a start: http://www.clublexus.com/forums/ls400/287083-how-to-replace-ac-evaporator-and-blower.html#post2683620
