Originally Posted by onehundred80
From the shop manual.
Note: A cable and a vacuum controlled servo are not
used. This is a servo-less system.
Control of the speed control system is accomplished by a
speed control switch (1) which is located just above the multifunction
switch (2). The speed control system also uses other
components of the vehicle to accomplish its tasks. The five
other major components used are as follows; The PCM, Accelerator
Pedal Position Sensor, Kickdown Simulator Switch,
Throttle Body and the Clutch Pedal Position Switch (Manual
Transmission). The speed control system is designed to operate
at speeds above 25 m.p.h. (40 km/h)
All those switches and sensors. Again, probably something electrical. The PCM is listed there... could be the problem.