Fuel Trim Diagnostics and OBD2 Scanner Guide
Alex and Emma explain fuel trim parameters, diagnostic methods, and OBD2 scanner features for engine troubleshooting. Discussion covers short-term corrections, long-term learning, and tool hardware differences.
In this episode
Fuel trim maintains 14.7:1 stoichiometric ratio through ECU injector adjustments
Combined fuel trim deviation exceeding 10 percent indicates fuel mixture problems
Idle versus 2,500 RPM comparison isolates unmetered vacuum leaks from fuel delivery faults
Live sensor graphing and multi-stream overlay separate advanced scan tools from basic readers
Links & resources
Read…
The skinny
The skinny isn't ready yet — notes appear once the transcript is processed.