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Hey there. I have been using my 3875 (Jeep JK, 2007) Flashpaq for a few months now. I notice a big difference when I use the crawling program and I also successfully calibrated my tire size although the number I inputted into the tuner isn't the correct ground-up height, using my GPS I did get the speedo set.
My question is this; I notice no difference in MPG, HP or torque when switching between stock, 87 octane or 91 octane. I am running the 91 octane tune and decided to put 87 in and there is no pinging whatsoever.
I am not throwing stones here, I am looking for help. Anyone out there have the same issues or have any advice?
Thanks, have a dry day.
Oh, SN 1516953

After posting this in Jeep area with no replies, moved to rants section. This morning, I installed 93 octane tune with 87 octane fuel. No pings at all. I went to a steep hill in my area that is 3/4 mile. Tried 87 tune and 93 tune, we felt no difference again.

Tell us more about the Jeep.

Is the engine modified?

Bigger tires? How big?

Any added weight to the Jeep?

Ron

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