flak monkey
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| posted on 5/6/10 at 08:30 PM |
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LC1 spasm?
My LC1 has randomly decided to stop reading correctly.
Normally reads 0v (0.5 lamda 7.5afr) on warm up then once hot without engine running goes to 5v (1.5 lamda 22afr) and then to whatever the engines
running at when you start it up.
Now its stuck at 7.5afr without the engine running and sometimes creeps up to 10.5afr and nothing more.
The engines definately still running right. And I get the same readins to the dash and to the ECU which are connected seperately to the 2 different
analogue outputs on the LC1.
Any ideas before I start pulling it all apart?!
Sera
http://www.motosera.com
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omega 24 v6
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| posted on 5/6/10 at 08:39 PM |
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Ha ha David we are defo on the same wave length today. Mines is swinging wildly from 7AFR to 20AFr and does not correspond to the gauge on tuner
studio at all. BUT the car is running fine. There seems to be a time out then then it works again. Looks like another sensors gone tits up I'm
afraid. Cheapest I can find is £54 unless you can source it cheaper.
If it looks wrong it probably is wrong.
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turboben
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| posted on 5/6/10 at 08:51 PM |
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Mines gone mad a couple of times but its usually ok after I remove the sensor and do the free air calib.
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flak monkey
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| posted on 5/6/10 at 09:12 PM |
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Yep going to try a recalibration tomorrow and see if that fixes it.
If not, then I am not overly worried as the cars set up properly now anyway. Its just handy to keep an eye on it 
Sera
http://www.motosera.com
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brianthemagical
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| posted on 5/6/10 at 10:50 PM |
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Read the fault code before calibration so you know where to start if it goes wrong again/isn't fixed by calibration.
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omega 24 v6
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| posted on 5/6/10 at 10:57 PM |
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Ain't no fault codes on mine the led stays permanently lit. just a sensor failure I think.
If it looks wrong it probably is wrong.
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matt_gsxr
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| posted on 6/6/10 at 08:04 AM |
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Connecting the laptop up directly to the LC-1 helps read the diagnostic codes (counting flashing lights is a pain). Also it allows you to read the
lambda value directly from the LC-1 (I read mine from the MS, and the output scaling could perhaps get corrupted).
Sensor failure sounds possible (I had this with mine, but for me this gave high AFR).
Matt
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flak monkey
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| posted on 6/6/10 at 11:51 AM |
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Done a recalibrate etc and no difference.
It reports the correct values in logworks but neither of the analogue outputs are giving the correct voltage 
They are definately programmed correctly in the LC1 programmer, but checked with a meter the outputs are only putting out 0.1v.
More problems
ETA - doest report correct values when engine is running, fine on warmup before startin the engine, then after that it reads 7.afr all the time unless
you rev it, then it flicks up to 15 or so then settles back at 7.5.
[Edited on 6/6/10 by flak monkey]
Sera
http://www.motosera.com
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