Join Date: Feb 2011
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IS Forum Members,
Good evening. I recently installed the F-Sport air intake and TRD (F-Sport) performance exhaust systems on my 2007 IS 350. While the car certainly SOUNDS more aggressive, the power comes on in very unpredictable and inconsistent manners. On top of that, my gas mileage plummeted by over 50mpg per tank, and pedal response has not improved. In short, the initial thrill of these new add-on's has died for me rather quickly.
I shared this with a few car buff colleagues at the firm. They suggested that the on-board computers have not been re-calibrated/tuned to accommodate the added performance elements. Is this true? If so, where would I go in the DC metro area to get a closer inspection?
BTW...has anyone else out there tried doing similar performance upgrades? Can you provide any guidance on the issue?
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