greensteeda

greensteeda

Retired Speed Racer Mod. Suck It! 37 From Nashville TN
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  • Duggie
    question, I installed a 73mm BBK TB and have changed tunes a few times. When I hit the gas hard & let off the gas the rpm's come down slow Could that be cause by "electronic throttles historesis" (Hysteresis)
    greensteeda
    greensteeda
    It could. I am not as familiar with the newer cars but I don't think they have a separate idle control valve because the throttle is electronic. If the ecu thinks you have a smaller TB, when it calls for 5% open, it will be letting in more air than it did with the smaller TB.
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