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
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