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I cover how to diagnose a failing fuel pump with fuel trim data without using a PRO-level OBD2 diagnostic scanner. If you are wondering how to diagnose weak fuel pump with fuel trim data, or maybe you're not sure what fuel trim data means, you will find this video helpful. It will help with how to tell if your fuel pump is going out using just fuel trim data which very basic OBDII scanners have via live data. It also covers how to diagnose a vacuum leak with fuel trim data. Shor term fuel trim (STFT) and Long term fuel trim (LTFT) are defined and interpreted in relation to fuel delivery and vacuum leaks.
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Timestamps:
0:00 - Intro
0:19 - What are fuel trims (STFT & LTFT)?
1:06 - Diagnosing fuel pump issues with fuel trims
2:26 - How to differentiate fuel pump from vacuum leak issues
4:02 - Wrap
#fuelpump #fueltrim #STFT #LTFT #DIYAutoworksNG #weakfuelpump
Credits:
Image at 1:26 - "Diagram showing the operation of a 4-stroke SI engine" (en.wikipedia.o...) By Zephyris (commons.wikime.... CC BY-SA 3.0 (creativecommon...)