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High rpm!!!!help

Discussion in 'ECU's, Electronics, and Tuning' started by SpiDer21, Nov 5, 2010.

  1. SpiDer21

    SpiDer21 New Member

    Likes Received:
    Oct 18, 2010
    hey guys...needing some inputs...just did my very fist swap...a b20 auto on a 90 DA teg...swapped the long block only! everything is bonestock including ecu...everything is good except the high rpm's that im getting...its killing me on mpg...any inputs????:confused:
    im getting a 3900rpm on a 70mph...<<<<<appreciate any help and inputs>>>>
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