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code 13 (O2) and WOT stumble at altitude; trying to figure this one out - SOLVED
Topic Started: Feb 17 2013, 06:53 PM (1,555 Views)
rjsdotorg
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I can see that - at closed throttle lean burn won't cook pistons, not really much heat made.

All I can think of ATM is to T off the fuel line and watch pressure to see if the pump fails, or... A filter won't intermittent clog, but the injector might have some issues, I suppose.
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Rhinoman
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To change the scaling go into the Acquistion menu and select 'edit definition'. In the definition file select 'value' and injector PW and change the max. value from 1000 to 65.
Bring up the O2S value and change the conversion so that it mulitplies the value by 1000.
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rjsdotorg
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Rhinoman
Feb 24 2013, 10:37 AM
To change the scaling go into the Acquistion menu and select 'edit definition'. In the definition file select 'value' and injector PW and change the max. value from 1000 to 65.
Bring up the O2S value and change the conversion so that it mulitplies the value by 1000.
Done. Thanks! A lot to that software...
I can now see that even as it flat-lined lean O2, when I shifted or goosed the throttle it would get rich, like at 15:04.
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Rhinoman
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TFT is Total Fuel Trim which is the trim that is actually applied, its usually equal to (STFT+LTFT)/2
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rjsdotorg
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Was thinking earlier, if I install the pot I have for the CTS tricker, or just disconnect it, it should run in open loop and run rich, correct? If it still reads lean, then either the O2 is wacky, the fuel pump has intermittent problems, or the injector has intermittent problems...
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Rhinoman
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The O2 looks good. I might be looking at the wrong file though as I don't see VSS going over zero and the CTS is reading low.
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clarkdw


This is really interesting reading. Thanks. Keep posting. :thumb
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rjsdotorg
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Rhinoman
Feb 25 2013, 05:25 PM
The O2 looks good. I might be looking at the wrong file though as I don't see VSS going over zero and the CTS is reading low.
http://rjs.org/cars/Metro/misc/hill%20climb.xdl
is the big hill climb. Around 11:28 O2 starts dropping to .019V and only goes back up to normal oscillation or rich when shifting or goosing the throttle.

I logged some today on the way in, and noticed the O2 drop to .058 on a short 800 foot hill climb at WOT in 4th. I had TP open next to me (not really officer...) and could see the effect of letting off the gas. O2 went back up to usual oscillation, or rich.
On freeway cruise, whenever I gassed it to pass or accel, O2 went rich as expected. In fact, any TPS over ~37% sent O2 to .9V, IPW to 4.2+ (leading, like an accelerator pump), and MAP to 970+, and STFT to 128+.
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rjsdotorg
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clarkdw
Feb 25 2013, 05:48 PM
This is really interesting reading. Thanks. Keep posting. :thumb
I'll post until I figure it out!
Getting a new fuel filter tonight in any case.
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rjsdotorg
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It appears that the new filter solved the stumble.
Now back to our regularly scheduled modding...
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