5.7 chip gear signal?

Discussion in 'All Topics, Chips, and Tech for Buicks' started by turbocamino, Aug 13, 2019.

  1. turbocamino

    turbocamino Well-Known Member

    trying to determine how my (87) chip/ecm knows what gear i may be in to make a parameter (timing/fuel) changes/adjustments ? thanks
  2. EricM

    EricM Administrator Staff Member

    It uses the MPH reading.

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