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  1. 07-05-2023 #1
    duallyTuner
    duallyTuner is offline
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    Question ODB1 Tuning questions

    I have been replacing parts chasing an intermittent cutout in my 88 gmc dually. Im basically to the ecm and swapped a reman from autozone and put my chips in. Its acts like a 3 speed instead of a 4 speed and know this is a pretty basic question but any ideas on where to start getting a new ecm just to confirm this one has a injector defect or suggestions on what I can buy that would improve this computer? 1988 GMC 7.4l TBI Crew Cab Gas Guzzler...

    Computer that came out of it says reman 2015 OE replacement 1227747
    Last edited by duallyTuner; 07-06-2023 at 12:00 AM.
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