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i have talked to a few previously about this problem i keep having, if the car is cold it will fire right up, but when i go out to start it after it has been ran prviously it chuggs and putts upon the start up and smells really rich i don't think it is a fuel issue because it fires right up when cold. it clears out after i take off. but every now and then it will burp out the exhaust when idling. that 's why i wondered if it was the iac becasue the maf should set a code correct. ummmmmmmmmmmmmmmmm :wtf