I have a no frills 98 Ranger with standard equipment plus air. When coming to a stop I press in the clutch and the engine continues to run at a high rpm. When this is happening the engine will continue to rev until I come to a complete stop. As soon as the wheels quit moving the idle will drop to normal. Turning off the air makes no difference. When this happens if I release the clutch the truck will maintain 30-40 mph in high gear even with my foot off the gas pedal. It acts like it knows when the wheels stop moving. I don't have cruise control so I don't know how it senses movement or if this is somehow coincidental. Has anyone else experienced this problem? If so, how was it cured?