Car Throttle Sticking Problems of Volvo S80

I purchased a 2000 Volvo S80 from carmax in Feb. 2006. The car only had 26000 miles on it so I thought it was a great deal. I contacted the manufacturer to see if any and all recalls had been performed on the vehicle. They said the only thing needed to be done was to have the electronic throttle module system to be upgraded in the cars computer. On 5-11-06 the Volvo dealer performed the upgrade. Within one hour of picking up the car it began to rev and surge with the air conditioner on as if the throttle was sticking. After parking it to run an errand I tried to start the car and it would start but then immediately rev up and then die. I had to get it towed to carmax which it was warranted under. Now carmax had the vehicle towed to the Volvo dealer to have the electronic throttle control worked on. The Volvo dealer diagnosed the problem as needing to replace the e. T. C. Module, which they did. Now I drive the car home on 5-16-06. After two hours of the car sitting at my house I attempt to go somewhere but the car starts and immediately begins to rev like before and then dies. I will attempt to drive the car to the dealer tomorrow 5-17-06 to be fixed again.

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