Seems to happen to a number of Durango owners. Get the throttle position sensor
(TPS) checked out and/or replaced.
"Suter, Rick" wrote:
> One of the many issues with my '99 5.2l is a sporadic increase then decrease
> of 2-300 RPMs while using cruise control on the highway at 75 MPH. The
> dealership, as usual, has been no help at all. My thoughts were lockup
> torque converter impending failure, some sensor telling the truck to do this
> or something along these lines. However, I noticed recently that the truck
> DOES NOT do this when cruise control is not used while driving a constant
> 75. I suspect, it's the cruise control, itself. What might drive this
> behavior if it is the cruise? Vacuum? Electrical?
>
> thanks,
>
> Rick
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