Quote Originally Posted by ghosthunter View Post
I am just thinking your Kia Price would be the carb or EFi?

Your problem might be electrical in nature. Not enough power to maintain a big spark from the sparkplugs if you have a big electrical load turned on (lights & A/C).

This could mean your battery might be starting to go bad or your alternator might be giving insufficent load. Was your headlight brightness changing as your rev up your engine?
When idle. The light brightness changes. As i turn off the aircon it turns normal. I just bought a new battery last week. I don't think its the battery. Could it be the headlights itself? It seems the engine can't carry the load when the aircon is turned on. It vibrates but if i step on the rev it seems fine but i can't always step on the rev right?