Cruise Control Problems of Lexus IS250

On 3/5/11 at approximately 8:30 am, I was in a parking lot traveling at about 5 mph in drive with my right foot lightly applying the brake when the brakes seemed not to hold as they should and the engine suddenly increased to 4500 - 5500 rpm. I applied increased force to the brake pedal, placed the gear shift into park, and noted the rpms climbing above 5500. I then pressed the start/stop button and the engine stopped. This episode occurred on dry, smooth asphalt on a clear, cold (30 degree) day. The engine was at normal operating temperature, initially running at near idle (in the parking lot), with the gear shift in drive, cruise control off, radio, cd, a/c, defroster were all off. Heat and fan were on with interior temp set at 74 degrees. This episode has not repeated as of the filing of this report (4 days post-event). Note: I was wearing "sneakers", not any type of oversized winter boots. The car mats had been previously replaced by the dealer as a result of an earlier recall; no additional mats were in place. All required maintenance, up to and including 36,000 miles, has been performed by the dealer.

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