Learning View Snapshots \ Discussions

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Re: Learning View Snapshots \ Discussions

Postby KiDo_Tuning » Sat Mar 29, 2014 8:53 pm

Adrian2627 wrote:After a couple of hundred Ks of mixed driving I've got a Learning View shot that looks much healthier.

Learning View_SS_A2SB000A_2014-03-29 18 50 16.jpg


No knock in the FLKC table but I'm still not 100% on the A/F Learning table. Can anyone lay it out for me?


AF#1 is long term fuel trims divided up into 'zones

So under 5.6 is idle
5.6 to 9 is initial take off
9-40 is generally cruise

40 to 80 is the important one. It self learns between 40 and 80 to add or subtract fuel to get the MAF scaling onto target as it blends into open loop. The thing with this is that what ever it learsn, sat +5% is then applied from 40g/sec to the end of the MAF voltage range. So it adds 5% fuel or roughly 0.7 AFR to the entire MAF scale :)

Nothing to be worried by those values :)

You want the 4th range as close to zero as possible and the others are all trying to get optimal cruise AFR's :)
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Re: Learning View Snapshots \ Discussions

Postby Adrian2627 » Sat Mar 29, 2014 11:41 pm

Thanks Matt.

I'll go back and have another read of the A/F stuff on RR site. My heads a bit swollen lately with studying Japanese, getting back into reading music, and learning all this stuff for these new-fangled carbie wannabes. I miss Webers.

Thankfully Japanese TV sucks. Their beer is good however.
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Re: Learning View Snapshots \ Discussions

Postby chimera » Tue Jun 03, 2014 7:22 am

I made this LV quick reference/explanation image might help some people, might need to be viewed in high res screen to see the whole thing...

Image
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Re: Learning View Snapshots \ Discussions

Postby bigBADbenny » Tue Jun 03, 2014 8:15 am

Outstanding effort thanks! :good:
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Re: Learning View Snapshots \ Discussions

Postby Brunsy3.0 » Tue Jun 03, 2014 10:08 am

I really need to get upto speed and actually download LV and learn how to read it. This graph helps a lot even without ever using LV thanks for sharing
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Re: Learning View Snapshots \ Discussions

Postby shav » Tue Jun 03, 2014 10:32 am

legendary work chimera. Thanks for this
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Re: Learning View Snapshots \ Discussions

Postby bigBADbenny » Tue Jun 03, 2014 10:44 am

Image

Here's the mobile phone sized version, hosted with permission from the author.
Click through for full size, should be zoomable. Works for me on iPhone ;)
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Re: Learning View Snapshots \ Discussions

Postby KiDo_Tuning » Tue Jun 03, 2014 3:01 pm

Airflow Ranges correction for the 40+g/sec should be +5% or -5%, as +5% addes fuel across whole fuel map but a value of -5% is pulling 0.5 AFR off the open loop fuel trims
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Re: Learning View Snapshots \ Discussions

Postby bigBADbenny » Tue Jun 03, 2014 9:59 pm

Image

TheMightyGonzo: It's a MY06 3.0RB, and it's had an error light which has been on and off since I bought the thing. It seems to trigger when the fuel tank is at about 2/3 full. I originally thought it was an issue around the fuel cap seal being dodgey, but according to subaru both the front cats are busted.

Any advice? Research: http://tinyurl.com/mbfp55v
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Re: Learning View Snapshots \ Discussions

Postby alexeiwoody » Wed Jun 04, 2014 12:25 am

bigBADbenny wrote:Image

TheMightyGonzo: It's a MY06 3.0RB, and it's had an error light which has been on and off since I bought the thing. It seems to trigger when the fuel tank is at about 2/3 full. I originally thought it was an issue around the fuel cap seal being dodgey, but according to subaru both the front cats are busted.

Any advice? Research: http://tinyurl.com/mbfp55v


Is that MGonzo's actual LV?

There's something going on there that looks more serious than a clogged cat. Need logsss and to take a look at ze car... :o
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Re: Learning View Snapshots \ Discussions

Postby TheMightyGonzo » Wed Jun 04, 2014 7:33 am

More serious than just the cats? :o That's not what I was hoping to hear...

And yes thats my LV, as of last night
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Re: Learning View Snapshots \ Discussions

Postby bigBADbenny » Wed Jun 04, 2014 8:42 am

Nick: I still owe you logging so let me know when you're ready :)
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Re: Learning View Snapshots \ Discussions

Postby alexeiwoody » Wed Jun 04, 2014 11:25 am

TheMightyGonzo wrote:More serious than just the cats? :o That's not what I was hoping to hear...

And yes thats my LV, as of last night


Iam drop = ignition timing pulled to protect engine = knock occurring.

If a cat is somehow choking the engine enough to get it to knock, I imagine you would've had a CEL for it long ago.

On the other hand a faulty O2 sensor is more likely. You'll benefit from proper logs to see how it behaves to get a better guestimate if it's farked. Start by cleaning your MAF sensor...
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Re: Learning View Snapshots \ Discussions

Postby bigBADbenny » Wed Jun 04, 2014 11:36 am

Yes the car was very used by the previous owner.
I'll bring my Maf cleaner for when we log it.
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Re: Learning View Snapshots \ Discussions

Postby chimera » Wed Jun 04, 2014 1:01 pm

IAM was originally designed specifically for the various octane differences in fuel I believe. Hopefully you're not throwing low octane shit in ya tank, turbo cars (especially) hate it. Could be false knock too, check there's nothing loose around the block
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