# Help car lurches and lunges **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [April 15, 2008, 8:33pm UTC](https://community.cartalk.com/t/help-car-lurches-and-lunges/12913 "2008-04-15T20:33:11Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![yovito2](https://avatars.discourse-cdn.com/v4/letter/y/ecd19e/32.png) [@yovito2](https://community.cartalk.com/u/yovito2)\ **Post date:** [April 15, 2008, 8:33pm UTC](https://community.cartalk.com/t/help-car-lurches-and-lunges/12913/1 "2008-04-15T20:33:11Z")
Have a 02 lexus gs300 that on occasion will lunge forward violently when you are coming to a stop for instance at a parking space. This has caused me to hit 2 concrete parking blocks and to come over a curb. this is really scary and dealer and mechanics said unless they can recreate problem they can’t help much. Any ideas please? ---
**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\ **Post date:** [April 15, 2008, 9:16pm UTC](https://community.cartalk.com/t/help-car-lurches-and-lunges/12913/2 "2008-04-15T21:16:16Z")
Do I understand correctly that unless the dealer’s mechanics are in the car and it lurches into 2 concrete blocks, and goes over a curb, that they can’t help? Call the regional Lexus representative with this problem. Make a complaint with the National Highway Traffic Safety Agency. This lurching could be caused by many things. The mechanics could, at least, try to find a cause. A few possibilities: 1. The throttle hanging up. 2. The cruise control “working” the throttle. 3. The IAC (Idle Air Control) valve going full open. 4. This, someone will mention: your foot hitting the gas pedal, instead of the brake pedal. 5. Carpet (rug) caught on the gas pedal. 6. etc., Have a reputable independent shop check it out. Consider having the cruise control disconnected, just in case. ---
**Author:** ![yovito2](https://avatars.discourse-cdn.com/v4/letter/y/ecd19e/32.png) [@yovito2](https://community.cartalk.com/u/yovito2)\ **Post date:** [April 16, 2008, 3:10am UTC](https://community.cartalk.com/t/help-car-lurches-and-lunges/12913/3 "2008-04-16T03:10:52Z")
yep, that’s right, oh after they advised me it would be $95 hourly service charge. thanks for the suggestions ---
**Author:** ![mmsamma](https://avatars.discourse-cdn.com/v4/letter/m/ed655f/32.png) [@mmsamma](https://community.cartalk.com/u/mmsamma)\ **Post date:** [April 16, 2008, 3:37am UTC](https://community.cartalk.com/t/help-car-lurches-and-lunges/12913/4 "2008-04-16T03:37:30Z")
cruise control is not active at parking lot speeds,and never will be…so count that b/s of the list