ecu | Ford Thunderbird forum club group 1955-2005 models

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ecu

  1. BigxN8

    1991 5.0 ECU Upgrade?

    I'm planning to put on a new throttle body and a new exhaust system on my 5.0. I have heard that without a performance chip, my car may run worse. But I also know that this car is from 1991, so would these upgrades hurt my performance and make it slower or would I need to get a chip to make it...
  2. BigxN8

    1991 Thunderbird 5.0 ECU Location

    Not able to find where it is. I'm planning to replace the chip with a performance one. Does anyone know where it is?
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