Mechanics

CRUISE CONTROL CHANGES SPEED AFTER GOING AT SET SPEED FOR A WHILE

1999 Dodge Ram • 89,000 miles

When I set my cruise control, it will stay at the set speed for a while, then drop it 5-10 mph. I have the 5.9L engine if that helps.
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T4
September 11, 2011.



That's typical of a vacuum leak in the hose going to the cruise control servo, or in rare instances, a leak in the servo itself.

Caradiodoc
Sep 12, 2011.