reving high when steppn on clutch?

[JspecGTS]

when im driven after releasing the gas pedal my car tends to rev higher when im on the clutch and it takes a sec for the rpms to drop to normal its almost like its double clutching all the time ??? i think its from the throttle cable not sure though if so is there a way to smooth/grease the throttle cable???or could it be from something else???

o yea how much do i have to torque the spark plugs ??when i checked them they where pretty tight and i dont think its suppose to be like that

[Deep]

If it only happens when the car is fully warmed up, it could be that your throttle cable is too tight. The rubber sleeve stretches a little when they warm up, causing the throttle plate to not fully close. Try loosening it just a little and see if that helps.

When I do my plugs I usually just get them finger tight and then 1/4 turn of the ratchet to seat them down.