NACE Automechanika

Being able to analyze total fuel trim correction in different fuel cells will help point your diagnostics in the right direction. Since the fuel trim correction factors are based on the O2 reading, we need to understand O2 functionality and confirm that they are working well first. For this reason, we will cover the different types of O2 sensors - Zirconia, Titan and LAF - and how to test them quickly.

The technician also needs to understand the impact if the PCM is using a speed density (MAP) type or MAF calculation process; this will have an impact on fuel trim correction factor. We will cover the difference between both and how it will impact the corrections base on engine load or volume efficiency.

The knowledge you will acquire during this training will help you save time and avoid doing long and unnecessary testing.

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