The cruise control engages but it doesn't hold the speed. It fluctuates
constantly from 2-3 mph below to 2-3 mph above the set speed in a cycle that
it is about 10 seconds long, guaranteed to drive you out of your mind in
less than a minute.
I am trying to figure out if I should look at the actuator under the hood
first, or the control module under the dash. Of course, there could be some
other cause that has escaped my scrutinous eye...
This has all the feel of a fairly common (or not unusual), straightforward
problem with a fairly straightforward solution. I just don't know what it is
and have had little success finding it on my own.
Thanks much in advance for any help or advice.