Originally Posted by rcush65

i had the same problem and ultimately what fixed the problem was plugging in a $20 scan code reader from amazon and erasing the memory in the sc430. i was getting ready to pull the back seat out and to clean faulty switches that tell the computer how the top is doing in its closing/opening operation. I hooked up the obd-11 with the dashboard open/close switch red light on all the time (fault), and a couple codes flashed (maybe the ones i needed to troubleshootr the switches) but in the main menu of the scanner no dtc codes were listed. so i elected to clear the memory since i had experience with this fixing an engine light on my avalon (faulty catalytic converter sensor). bam, i havent had any probs since. the problem started driving and stopping the car in traffic while in the middle of open/closing the roof foolishly.

Originally Posted by ShawnOk

MedSC, congrats on the fix. The top is truly the most alluring aspect to the SC. Without it, it's just not the same. Too bad it was a pocket breaker, though. In regards to the acceleration, check this out... https://www.clublexus.com/forums/sc-...0-a-650-e.html. There's also the SprintBooster ETC, as I stated in my post. Both have info on this thread. Just use the search at top. Good luck.