Testing Lambda output

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Alan 480
480 Is my middle name
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Joined: Sun Aug 28, 2011 9:03 am
Location: Aberdeen

Testing Lambda output

Post by Alan 480 » Sun May 17, 2015 3:36 pm

looking for pointers on the testing of Lambda sensor

Max voltage was about 0.6 Volts, minimum was around 0.2V, this was measured between the output from sensor/input to ECU & earth. (ie the big thick GREEN wire & earth)

I found this link which 'sort' of helps. (I have 3 wires going to the unit, live, earth & signal)

http://www.picoauto.com/applications/lambda-sensor.html

Car was 'warm' oil temperature around 53, water unknown (sensor/display a bit iffy)

I did save the file as a dat file which I canna open, and I should have saved as a CSV which would have given me time base/levels etc.

suffice to say that there is about twelve seconds between the two vertical lines, so it is doing something, but maybe the wrong thing, last year's MoT it was TOO lean, Re-reading the pico-scope info it would appear that it should vary from 0.2 - 0.8V (0.2 is lean, 0.8 is rich) so if mine never gets above 0.6V then this explains last years MoT result.


How do I insert an image?? (I don't use photo bucket etc :-( )


Looks like a new down-pipe?
Last edited by Alan 480 on Sun May 17, 2015 9:39 pm, edited 1 time in total.
Alan

480 ES 2litre 'Celebration' ? , C30 1.8ES, SS1

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glasgowjim
480 Is my middle name
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Joined: Sun Oct 01, 2006 5:28 pm
Location: GLASGOW SCOTLAND

Re: Testing Lambda output

Post by glasgowjim » Sun May 17, 2015 7:04 pm

lambda sensor readings are on the forum somewhere check john turbos posts

but the readings for a NA car are different. fiound out the hard way :D

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