Rich under boost with Secs??
08 May 2003, 02:44 PM
#1
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A normal WRX lambda reading will saturate/clip at that lambda reading. It is actually richer.
You cannot tell how rich you really are (in fuelling terms
)
Edit - I presume the units are lambda not volts Andrew.
[Edited by john banks - 8/5/2003 2:45:27 PM]
You cannot tell how rich you really are (in fuelling terms
)Edit - I presume the units are lambda not volts Andrew.
[Edited by john banks - 8/5/2003 2:45:27 PM]
05 August 2003, 02:42 PM
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If thats .76 volts from the Lambda sensor then its very lean for full boost.
The ECU will have a lower value than you would see on an accurate DVM but you should be seeing .87+ under full boost.
Andrew...
05 August 2003, 02:44 PM
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Andrew mate, it's from a secs monitor which reads from ECU...it's the other way around with this monitor. Runs upto 1.64 when on over-run (no throttle) which is lean and down to .76 (the lowest it will read) for rich running.
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05 August 2003, 03:50 PM
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Okay then, anyone know what the SECS is reading here?
Obviously it's not the voltage straight off the lambda. Is it meant to refer to an air:fuel ratio (and they're not converting it properly) or what?
Obviously it's not the voltage straight off the lambda. Is it meant to refer to an air:fuel ratio (and they're not converting it properly) or what?
05 August 2003, 04:05 PM
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It is "lambda" off the pseudo-wideband.
Lambda = AFR/14.7
So 11.5 AFR is lambda 0.78 for example.
The new age pseudo wideband goes as rich as about 11.3 AFR and then clips.
Lambda = AFR/14.7
So 11.5 AFR is lambda 0.78 for example.
The new age pseudo wideband goes as rich as about 11.3 AFR and then clips.
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