When i start my car cold, it cranks up but it isn't a nice smooth VROOOM(!) like it used to be. it kinda pauses in between the cranking and the engine turning over - like there's not a valve openeing properly or something. it's weird i can't figure it out. it's also suppost to instantly jump up to around 1500 rpm's when cold idleing, and after the weak start it low-rumbles at very low rpm (maybe 800 - 1000) and then slowly creeps up to 1500 by itself. if i give it a little gas then it will hold the proper rpm's. i bought an ignition switch in hopes that this might solve my problem but for some reason i doubt it will. anyone have any advice? :attention