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Car ran great for months with ECU flash. Super strong!!!! Took my bro for a ride. Did a few WOT. Felt great. Later that day drove to work. When leaving work car felt sluggish. Very noticeable. I do not think the values change at all in an ECU flash to cause this. Also, after flashing back to 100% stock it felt the same.... Sluggish at low rpm. That is why I don’t not think flash had anything to do with it ( aside from 13 psi boost levels on a stock car lol )
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