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tc help

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    I have a 2015 tc with injen intake, agency lightweight pulley and trd axle back. when I accelerate between 3k and 5k it stumbles but up to 3k and after 5k it pulls hard why is this? There's also a hissing sound coming from my engine bay I don't know from where. It only makes this sound when its under load, is this the intake or an exhaust or vacuum leak? thanks
    Hissing I'd be pretty positive its the intake, as far as why you're not getting it to pull between 3k and 5k, no clue. Did you do a proper reset of the ecu after the install of the parts so that the computer could properly adjust to the new mods?
    I unplugged the negative terminal from the battery for 5 seconds. Could it be knock retard from the pulley?
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