I've owned an 87 K5 for about ten years and am just now getting a better understanding of the TBI system. I am having an issue with tuner pro, not sure if I have the right files downloaded or not. Finally got it to work but it doesn't show much. It shows the rpm, speed, O2 sensor data, and tps. In the videos I've found on YouTube they seem to have a while bunch of data. I downloaded the files from tunerpro, but I saw there was some on here so maybe I'll have better luck with those?
This looks like a good forum to help me get my truck running a lot better, so glad to have found it!
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