Ok, Ill be cruising in my car and Ill put the clutch in.. and nothing will happen. My rpms wont change.. I can still shift gears without a grind, but the rpms will stay at the last rpm they were at, before I took the car out of gear. Its not just the tach, its the engine idle! Im just wondering if this is a clutch cable problem, or if there is something else I could try.

Already tried new tb with new tb sensors.. need more assistance. Thanks!

What kind of car?
Motorcycles have clutch cables.

Fords use clutch cables too... At least the 'Stangs did in to 90s...

This is an engine issue.
Possibly a sticking throttle cable or linkage.