TechShop's Tool Minute: Interpreting Fuel Trims

TechShop’s Tool Minute: Interpreting Fuel Trims

A scan tool can help you chart and graph long and short-term fuel trims to give you a better understanding of what's going on in a vehicle's engine.

Air/fuel ratios on modern engines can range from 13 to 1 all the way up to 22 to 1. But don’t hit the panic switch just yet. No matter what the air/fuel ratio, there’s a fuel trim cell that addresses each specific one. 

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