so i set the cruise control at lets say 110, it drops to like 108 for a second and usually (or used to) accelerate to 110 and stay there NOW it climbs all the way to 125 then lets off the gas till 105 and tehn repeats the process!!! whats going on!....btw happens everytime, not just one time

 

You're talking kph right?! And this is a dumb question but this is on flat roads, right? My car on hills will accelerate rapidly until I begin to go downhill when it turns off... If you're talking 110 mph then you need to go to jail or something!

 

i had a truck that did that, (only not at that speed) and it was the cruise controll switch....had it replaced at the dealer, and its all better.