ok, there are two things with my car that im concerned about. my car when i start it up after it sitting for a while will idle at 2k for a a while, i know it usually does this in cold weather and not in warm weather, but it still idles at 2k when i start it up after it sitting for a few hours and what not. The second question is about my car starting up, recently i will turn the key and it turns over, but it will shut off after a few seconds or not even a second. i dont know know what it could be, someone please let me know!