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Author Topic: Really bad oscillating idle  (Read 6727 times)
wannabee900
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« on: September 22, 2015, 02:01:11 PM »

Can someone have a look?  please!
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adam-
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« Reply #1 on: September 23, 2015, 05:24:34 AM »

IRL/IOP relationship?
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SB_GLI
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« Reply #2 on: September 23, 2015, 06:58:39 AM »

I've accidentally screwed up (unknowingly modified) a couple cells in the upper left hand corner of IOP (low load, low rpm) before and it caused some wacky idle issues.
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wannabee900
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« Reply #3 on: September 23, 2015, 07:10:37 AM »

IRL/IOP relationship?
Don't think so from what I can see in the log

Image showing oscillating
« Last Edit: September 23, 2015, 07:19:58 AM by wannabee900 » Logged
SB_GLI
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« Reply #4 on: September 23, 2015, 11:10:34 AM »

Don't think so from what I can see in the log

Image showing oscillating

Mine was nothing like that.  It was like a 150 rpm fluctuation max.  Yours is pretty crazy, up past 2,500rpm!
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wannabee900
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« Reply #5 on: September 24, 2015, 12:08:54 AM »

Slightly more advanced ignition in idle territory might have helped a little bit. The car has lowered compression.
It would still be nice if I got some more hints from the log. Thank you
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aef
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« Reply #6 on: September 24, 2015, 01:19:46 AM »

Which ecu? What has been done on the hardware side?
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wannabee900
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« Reply #7 on: September 24, 2015, 03:54:41 AM »

Which ecu? What has been done on the hardware side?
7.1  . Bigger turbo, lowered compression, injectors
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adam-
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« Reply #8 on: September 24, 2015, 03:58:47 AM »

Turbo won't affect idle.  How low, and what injectors, what is your scaling?
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wannabee900
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« Reply #9 on: September 24, 2015, 08:01:02 AM »

Turbo won't affect idle.  How low, and what injectors, what is your scaling?
Lower than most :-) and the horrible (@idle for some people) 630cc  Tongue (but to me it does not look like tvub/temin problem) . Scaling could be off but still, why does this situation not occur every day? I've yet to find something like tmot or tans that would put me in a bad place in a table. It just happens sometimes. And shouldn't be to hard to see in log if scaling was the problem?
While I now after this log have advanced ignition I also lowered KFMRES since the ignition changes to smoothen idle are quite big as can be seen in log with ecuxplot. Where do I adjust PID settings for idle?
In OP attached log I've tried to get as many idle relevant bits and values logged as I possibly could.
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dream3R
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« Reply #10 on: December 06, 2015, 09:06:17 PM »

dekas?  increase torque reserve and raise idle
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How to work out values from an A2L Smiley

http://nefariousmotorsports.com/forum/index.php?topic=5525.msg52371#msg52371


Starting Rev's http://nefariousmotorsports.com/forum/index.php?topic=5397.msg51169#msg51169

noobs read this before asking http://nefariousmotorsports.com/forum/index.php?topic=9014.0title=


ORGORIGINAL 05 5120 creator for Volvo
ORIGINAL Datalogger (Freeware) Author
ORGINAL finder of the 'extra' torque' limits
I don't have ME7.01 A2L I just use ID
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