Two problems related to cruise control have been reported for the 2008 Toyota Matrix. The most recently reported issues are listed below.
My 2008 Matrix engine races up, and reaches speeds of 90 with out my foot on the gas. It happened for the first time almost a year ago. I was told that it was nothing, could it have been the mats. . . . I didn't have mats in my car. I haven't been able to use my cruise control, the engine rpm goes really high, like it is going to race. My husband was driving the car over the weekend and it raced, he was able to stop the vehicle. Went to the side of the road. Every time I have brought my car in they say they can not duplicate the problem. It usually happens after I have been driving my car for 30 or minutes. I'm trying not to worry about it, but I'm sure that there are other people out there who are having problems with their cars, take them to the shop and are being told that they can not duplicate a problem. Any one who knows anything knows anything knows that 9/10 the mechanic can not duplicate the problem.
2008 Toyota Matrix developed a grunting/rattling sound when the cruise control was activated about a year ago. Deactivating the cruise control didn't solve the problem but first disappeared after pulling off the high way, shutting off the engine and hence resetting the systems. Which problem has been fixed by Toyota newburgh NY swiftly, with the remark that this was something they had never experienced before. In the light of the accelerator problems that continue to plague us all this might be an item of interest on your behalf?.