Cruise Control problems of the 2004 Infiniti G35

While traveling on the hwy the cruise control on my vehicle dis-engaged numerous times on its own. To ensure that I was not inadvertently touching the brake I pulled my feet back from the brake until it occured again. The vehicle was taken to the dealership where they said there was nothing wrong with the car.

I have a 2004 GS sedan with about 2000 miles on it purchased in October 2003. In the last few days I have had three occasions when the accelerator floor boarded itself with no action on my part to cause such behavior. On one occasion the car was in cruise control at about 60, and accelerated to 90 before I could get the car under control. Pushing the brake pedal did not disengage the action. The second time the car was in cruise control at about 50 and the same thing happen as I gently pressed the accelerator to pass a car. The accelerator unexpected went to the floor, with resultant very sharp acceleration. This time I had to turn the ignition off, and coast to the side of the road. The car would not start since the accelerator was floorboarded. Finally got the accelerator to break lose by using the edge of my shoe sole and the car would restart, and then behaved normally for a period of time. The third time I was not in cruise control, had slowed for an exit ramp, and then gently pushed the accelerator to speed up. Again the accelerator floorboarded itself, with very sharp acceleration. I disengaged the behavior by again lifting the accelerator with the edge of my shoe. One could feel a pop each time the accelerator was lifted with the shoe. Took the car to the dealer who has now had it five days. Says he has not seen this behavior and his position is that unless he can replicate it himself there are no repairs to make. I will not take car back until dealer signs a letter validating that I consider the car unsafe to drive and that he will assume any liability for accidents related to the problem. Expect that this will lead to an impasse with the dealer.