Oxygen Sensors & Fuel Trim.wmv

Oxygen Sensors are joined at the hip with fuel trim - here's a short discussion...

Category:

Autos & Vehicles

Tags:

• fuel trim
• O2 sensors

[McCuistian]

At idle the throttle is closed and there is very little fuel being injected. At higher rpms the throttle plate is open and larger amounts of air and fuel are being delivered, reducing the effect that the vacuum leak has at idle. It's all about the proportion of the leak, you see. I hope this helps.

[McCuistian]

Thanks for that very confusing comment :)

[McCuistian]

Interesting how there are different perspectives - some folks like it, some don't.  My students learned a lot - they're the ones I'm getting paid to teach.... LOL

[McCuistian]

Thanks!!! I try.

[McCuistian]

Thanks... I try.

[Shackelchevy77]

Why does a vacuum leak cause idle to fuel trims (short and long) to be high but "ok" at any throttle. I was told the answer will make me beat my head on the wall for not being able to answer it. He said it was a simple concept.

[nesgael1]

@fieldsofomagh This is very helpful. Although i know what the logic is behind oxygen sensors I was not able to condense it so precisely

[fieldsofomagh]

oxygen sensors should be relabled "lack of oxygen sensors"

The reason being it only produces an output when there is an absence of oxygen!!

Lean means "rich" rich with oxygen.Rich means "lean"lean with oxygen

Hope this helps

[zorokakashi]

FYI to new guys, closed loop has a feedback. open loop has none, strictly base on set point and process

[zorokakashi]

If was younger, still have money(working now lol, ironic isnt it) I'd attend your class Mr.