Thanks so much for the heads up Jim! I'll check the fuel pump pressure, run another data log, then I'll be getting back to you. My truck is having the same issue you said you had, BLM 133 or higher constantly, afterfire coming off closed throttle downhill, stumble accelerating uphill under load, (seems the ECM detects a too lean condition and then tries to compensate by dumping more fuel to the engine.)
Moved this discussion to NEW POST HERE.
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