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In this video I’ll show how to perform an oxygen sensor response test, and how to inspect for a leaking fuel pressure regulator. The oxygen sensor response test demonstrated can be successfully applied to any oxygen or air/fuel ratio sensor, regardless of design or number of wires. This test is extremely valuable when diagnosing fuel trim issues, when the accuracy of the oxygen sensor is in question.
Engine Performance Diagnostics chapter 5 page 4, and chapter 14 page 9
- intermittent rough idle
- intermittent stalling
- long/extended cranking time
- start/stall
- poor gas mileage
- replace leaking fuel pressure regulator
- using scan data to monitor fuel trims
- interpreting short and long term trims
- performing an O2 response test
- how to test for a leaking fuel pressure regulator
- scan tool
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(Chapters 4 and 5) Fuel Trim and Oxygen Sensor Testing
Related videos:
Chevy 4.8 Oxygen Sensor Test (fixed rich signal P0172, P0175):
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How to identify a bad oxygen sensor (signal fixed rich):
{youtube}ClCuoi3JxEI|615|345|0{/youtube}
System Too Rich P0172, P0175 from a blown O2 heater fuse (Jeep):
{youtube}SEuGtggZAvo|615|345|0{/youtube}
How to simulate a rich & lean O2 signal (PCM response testing):
{youtube}7MDtYzHl6AY|615|345|0{/youtube}
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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.
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On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!