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Initial Dyno Run and Problem Diagnosis

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What Happens If You Turbo a 5.3L Yukon With No Other Mods? Lets Find Out! (Uncle Rob Hits the Dyno)

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What happens here

The video opens with 'Uncle Rob,' a GMC Yukon, on a Dynojet dynamometer. The team attempts initial runs, but immediately identifies a major issue: the engine's injectors are stuck wide open, dumping excessive fuel into the engine. This indicates a severe engine control unit (ECU) or fuel system problem preventing safe operation.

Goal: Identify critical engine control and fuel delivery issues.

Tools and materials

  • Dynojet Dynamometer Dynojet — Measuring engine power output and diagnosing performance issues
  • GMC Yukon GMC — The vehicle being tested and tuned

What they say

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it's either spinning or coming apart i don't know this this is literally a stock vehicle with whatever turbo you put on it because we have no map sensor no map we have no idea what it's doing the injectors are literally staying wide open like they're just opening and not closing periods so what are you doing

Auto-generated from the video audio.