2004 Kia Optima 2.4lMay 28, 2014Engine idles smooth but when I put it in drive it Backfires and stalls Keywords:backfiresMisfire and backfiresOptimastalls 2 thoughts on “2004 Kia Optima 2.4l” Freeautomechanic May 28, 2014 at 9:57 am Is the check engine light on? You will need to pull the codes and post the codes in the comments and we will help narrow it down for you. also, does it it stay running if you give it a bit of gas when you put it in gear? Does this happen when the engine is cold or hot or all the time? nshimiyimana ismael September 27, 2017 at 5:38 am i want coclor code wiring engine GDN29C Comments are closed.