1997 Isuzu Rodeo Question Engine Choking first thing in the

Ever since it has gotten a little bit warmer out, meaning 40 degrees or so, my rodeo seems to choke out some when I start it first thing in the morning. If it sits for 12 hours or more then when I go to start it, I have to give it a little bit of gas and let it warm up for a long time before I can pull out without it dying. Then I have to drive it just a little bit, not even a mile and then it comes out of the bogged down engine and drive just fine. The check engine light is of course flashing during this warm up time. I know my rodoe has a light of miles on it, but I need it to last a little bit longer. Any suggestions as to what the problem might be and how to fix it? I appreciate any feedback! Thank you!