im having some cold start up problems . All of sudden the temp in my area dropped to about 50degrees and today i started my car and it was rough and didnt want to start but i manage to make it start. I had to keep puttin some gas to make it idle or it will die out ..but about 15 seconds later..it went back to normal...can you tell me what is the problem?...And also i been having some idle problems , it keep going up and down occasionally. thanks!