dk99

Update on stalling and hesitating: The dealer changed TPS but the problem did not go away. No warning lights coming up on display! Resetting ECU did not do any good. Lexus dealer decided to keep the car until they find out what is wrong with it. Meanwhile they gave me a loaner to drive. I will keep you informed on any new developments

Thanks, I will try that. Did not worked. The car still stalling and hesitating!

I am new at this so bear with me. I bought my 1999 GS300 less than 3 years ago (65,000 miles) and had no problems untill now. Less than a month ago it started stalling at the low rpm, not every time (no consistency) and also some times (no consistency again) it hesitates at the highway speeds. It feels like something holds back the transmission and then releases it (sonick boom). Dealer can not find anything wrong with the car, no computer codes show up!! Dealer is blindly changing parts with no cure so far. Please help! I welcome any suggestions or guesses. I do not enjoy my car anymore!!! :(