06/05/2026
Today's training truck: Duramax 6.6
Under throttle, the engine starts hunting and surging before eventually leveling itself out. That kind of uneven fueling or airflow usually means there's a deeper issue hiding somewhere in the system.
For now, we found a temporary way to get the truck idling properly while continuing the diagnosis.
And that's the important part: temporary.
A temporary fix helps confirm a theory and keep the troubleshooting process moving, but it doesn't mean we've found the root cause yet. The real repair comes after the diagnosis is complete.
Stay tuned as we continue tracking down what's really causing the problem.