SECS - Running lean or rich ?

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06 August 2005, 09:08 PM

marklemac

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SECS - Running lean or rich ?

Hi,

Can a SECS unit display whether the car is running lean or rich.

If so, which heading is it under ?

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06 August 2005, 11:30 PM

StickyMicky

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does it not have an afr reading?

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07 August 2005, 03:35 AM

ex-webby

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Yes it does.

Regards,
Shaun.

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07 August 2005, 08:28 AM

marklemac

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OK, so on the AFR bit, how does one interpret the reading it is giving ?

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07 August 2005, 01:28 PM

JohnD

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Have you got it set on lambda or ratio reading? - It's switchable. On my 03 STi I've got it set on ratio and on idle and general driving get around 14.5:1 Accelerating will drop it to 11:1/12:1 (rich) coming off the throttle will show 23:1 (lean) (approx. figs.)
On lambda setting the base figure is of couse 1 which equates to 14.7:1 so the idle/general figure is around .98/.99
JohnD

Last edited by JohnD; 07 August 2005 at 01:30 PM.