Fuel mileage still sucks

[Rawze]

(10-29-2021 )schISM Wrote:  One thing that jumped out at me while reading your posts was the dealer turning it up to 525. I’d have to research this but I don’t think any cpl.#’s are able to crossover the 500hp threshold. Either you have a 400-500 or a 525-605hp. I’d put it back to the original calibration listed on your ecm and see if that doesn’t help.

I agree.. I was about to post about the same thing .. lol.

What is the engine ser#? .. and what program exactly was shoved into it?. This could have been a bigger mistake that you think. Those stealers#its are clueless!.