Just returning from a 2,200 mile road trip through Texas and New Mexico, on the last couple of days I ran into an issue with my CC. I installed my CC the winter of 09 and have had good luck with its performance up until now. It may have been a little slow to engage sometimes but held my preset speed very well once it attained it. (Sometimes it would lock in as soon as a set it). On the last couple of days of this trip it started acting really funny. Can't tell you how much variance it had (8-10 mph would be close),
lets say I tried to set it at 74 mph, it would slow down to the high 60's and then come back to around 72 and hold it pretty well on flat ground. Once I hit a hill and it figured out I was slowing down it would run up to around 78 and hold that as long as it felt the load of the hill. After topping the hill it would slow back down to my preset speed or a little slower. Once I started down a hill it would slow to the mid 60's and stay there until the next hill. Kind of backwards to what you would think it might do. I know I have gotten used to having it and it sucked not being able to use it. Any suggestions on how to trouble shoot it. Thanks for any help. One other oddity, if you turned the unit off then back on, you could get a closer speed setting by hitting the resume button instead of the set button.
lets say I tried to set it at 74 mph, it would slow down to the high 60's and then come back to around 72 and hold it pretty well on flat ground. Once I hit a hill and it figured out I was slowing down it would run up to around 78 and hold that as long as it felt the load of the hill. After topping the hill it would slow back down to my preset speed or a little slower. Once I started down a hill it would slow to the mid 60's and stay there until the next hill. Kind of backwards to what you would think it might do. I know I have gotten used to having it and it sucked not being able to use it. Any suggestions on how to trouble shoot it. Thanks for any help. One other oddity, if you turned the unit off then back on, you could get a closer speed setting by hitting the resume button instead of the set button.