legendlime05

you filled up with 91 octange gasoline, you tuned your ecu to run 89 tune. thus changing making your ecu think its on 89....but its on 91.....follow? PUT THE 91 TUNE ON. a tune changes the timing and other stuff to run that spec of gas.... you arent running the correct gas for that tune.

2012Kona

I'll disagree with you and leave it at that.

legendlime05

how are you disagreeing with me? you put a tune on your car to run 89 octane gas. but you dont have 89 octane gas in your car, you have 91... how can you argue that?

2012Kona

I don't think I am arguing. Do you know how octane works?

legendlime05

ok, go upload the stock tune. then upload the 91. just try it for me. please?

jcieutat

On my 2010 GT, I had the CAI/Tuner from AM and it did not work for me. I kept on telling myself it was better but in the end, it seemed to me it was no better than stock. I tried all 3 tunes with the octane accordingly. Then you have to deal with properly oiling (when its time to clean it) the filter or the car will die frequently. I will never do a CAI/Tuner again. Just my .02 cents.

Who knows, maybe mine was off as well.

I instead got rid of the 2010 for a 2012 and man is there a difference!!!!!!!!!!!!!

Good luck

shoeys08dkcandygt

The ecu will adjust parameters up but not down. Fine to run a 89 octane tune with 91 in the tank. Not good to run 91 tune with 87 octane though.

BigDinTexas

He can disagree because:

91 gas with 89 tune = A OKAY!!!

87 gas with 91 tune = NOT GOOD!!!


You can ABSOLUTELY run a higher octane gas than the tune requires. It will not cause damage and only be a waste of money (since higher octane is more expensive). The car doesn't know or care what octane you have. The higher octane prevents detonation that might occur at a lower octane. That allows the tune to be a a little more aggressive in the timing and such.

Don

2012Kona

Under the hood. Haven't put all the trim back on. Was going to do my Boss intake this weekend but now I may hold off.

legendlime05

see, from my understandin with the tunes was that it didnt allow for the ecu to readjust itself for the different octanes. thus why there are different octane tunes?
i will say that i am wrong, my bad!