okay so i have notices that when the car is running cold it idles fine at just in the middle of 1 and 1.5 rpm but when the car is warmered up it increased to just under 2k and it keep dropping to 1.5k and then raises it self back to just under 2 and keep doing that can anyone help me with this problem i thought it was the throttle cable but checked it and it seems to be fine.