My car has some problems i need help with, well 1st, is when i start the car it idles rather high 2k Rpm +. it then settles down but then the rpm jumps up and down from 1000 to 1500. when i blip the throttle it stops but it idles at 1600. Ok 2nd. the car doesnt pull like it used to. when it hits vtec it studders and stubbles alot and just runs like shit to be blunt about it. i check the oil level and its fine, checked coolant level and its fine. any ideas of what it might be? thanks alot.