The cruise control on my '88 LXi is very slow to disengage. It doesn't matter whether I use the clutch pedal, brake pedal, or the off switch. It takes about 20 seconds to begin to decelerate. If I do use the brake during this time I am actually fighting the cruise control. Also, upon cresting a hill, the cruise may accelerate up to 15 mph beyond the set speed. thanks for any helpful suggestions!