i am having throttle sticking problems. the first couple minutes of driving its fine. then if i leave the throttle at a certain position for like more than 2 minutes like when i'm cruising on the freeway then let off rpm goes does really slowly and stays at 2000ish rpm.. and if i stab the throttle and let go really fast, it goes away the rolling goes back to the regular 1200ish. if i don't stab the throttle and just let it stick at 2000 and come to a stop, it would also drop to normal. sometimes the idle surges too but thats pretty rare. i have tried everything from cleaning the throttle plate, lubricating and cleaning the **** out of the butterfly/spring thing, loosening and tightening the throttle cable to give or take away slack, and lubricating the cable. it is a brand new type r throttle cable. the throttlebody is a bbk 70mm. this problem popped out of no where, it never use to do it.

 

mines only does this in the winter, i guess cause of the extreme temperature changes causing the metal to expand and contract. Im tempted to remove the butterfly and give it a light sanding or drinding to prevent it from sticking. I got an edelbrock 65mm TB by the way.