4g63telantra
15+ Year Contributor
- 454
- 0
- Dec 10, 2004
-
Toronto,
Ontario_Canada
I seen a few wideband that shows AFR or lambda
just want to know what it is?
just want to know what it is?
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Blueman is right.
Lamda is a ratio that refers to your current A/F Ratio and stoich of that fuel.
For gasoline the Stoichiometric measurement is 14.7:1.
So for example If you're running 12.6 A/F Ratio on gasoline, then your Lambda would be 0.86.
To figure that out, you multiply your lambda ratio (0.86) *times* 14.7 (stoich) to get your A/F Ratio.
Or if you're seeing your A/FR and you want to see what Lambda you're running you would divide your current AFR into stoich. (12.6 / 14.7 = .86)
So if you were running exactly 14.7 A/FR that means you're running 1.0 Lambda.
It's just like a test in school. You get a 86% on your test. That means you got 86% out of a 100% possibility.
Same thing with Lambda. You have .86 lambda. That's 86% of your possible 14.7 AFR. (12.6)
It's just another unit to refer to. It's like MPH and KmH. You're still measuring speed just in different way.
To really understand it, watch the video on here that says Tuning Basics, Theory, and Applications.
http://www.innovatemotorsports.com/resources/lm101.php
Kind of old thread but if anyone knows please chime in. Using the Lamda theory am I correct in saying; anything below 1.00 is lean and above 1.00 is rich? So .52 would be lean?
It would actually be the opposite.
Anything below 1.00 would be richer then 14.7:1
Anything above would be lean.
So at 0.53 Lambda your A/F would be around 7.7:1
If the readings are accurate I'd say your running a TAD bit rich.
You have it backwards.
0.52 * 14.7 = 7.64:1 AFR
Holy crap that's rich.
EDIT -> Crap, cdndsm beat me to it. I have to learn to type faster.
I've never used a MAF translator, so I'm going to have to let someone else handle that part. But I know if the ECU isn't getting a useable airflow signal, it isn't going to be your friend anymore. It will drop you into limp mode and run pig rich to protect the motor. Do you have a CEL?[/QUOTE
When I first checked for cels there werent any but I'll check again (I have to use my diagnostic computer his bulb is unplugged due to a 2nd o2 elimination). It does sound like its in limp mode though. We'll recheck all the wireing. Sounds like the translator isnt talking to the ecu properly, or the maf isnt talking to the translator. Thanks.
When I first checked for cels there werent any but I'll check again (I have to use my diagnostic computer his bulb is unplugged due to a 2nd o2 elimination). It does sound like its in limp mode though. We'll recheck all the wireing. Sounds like the translator isnt talking to the ecu properly, or the maf isnt talking to the translator. Thanks.