I understand about the octane ratings and how they work, that is why I said that I doubted it would make a difference, but I gave it a college go and it paid off for some reason. I know where the IAT code came from and that is why I had it reset to see if it would come back. The MIL hasn't returned and now after 24 hours it is running strong with no hesitations at all.
My car cannot run on 85 octane Hyundai's are designed for 87 octane and I put in 89 for giggles, because I was at my wits end with this car and the minor issues.
I have ideas, but I came here to honestly see if anyone has ever had or has seen an issue like this from a car. Hesitation from idle only no other times will it happen and it has to be above 70 degrees ambient while the vehicle is at operational temps.
I have looked at everything from grounding issues to every sensor that works the intake and output side of the powertrain of this car and nothing makes sense. I read through the "why does my car hesitate" thread on this forum and some of the cases are similar, but not enough to make me want to explore that area in great depth; because it isn't close to the symptoms that I am experiencing with this car.
Friday, May 22nd, 2009 AT 11:24 AM