Considering buying this 1991 Lariat with a 302, and have been experiencing a couple anomalies today while driving it.

First, the check engine light comes on. Sometimes goes off quickly, other times stays on for a few minutes.

Sometimes this is associated with using the cruise control, other times it just happens.

Second, the cruise control wanders. Loses a few mph, then decides it ought to catch back up. What are the chances that this is a servo problem? The truck has 67,000 actual miles on it, and is otherwise in excellent shape. Previous owner took care of it.

Thanks,

Mike