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Learned Values Help!


romeyromes

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What fuel are you using and what mods?

 

The top line tells you the most in this case. IAM should be 1. Anything less means there’s been enough decent knocking to justify a global ignition retardation. Jap imports will sometimes sit at around 0.9 or slightly less if driven hard purely because NZ 98 is still worse than the jap 100 they’re originally tuned for. 

 

In the fuel correction section the last row (40.00) is the only one of concern. The 2.3 means the fuelling is off by that much in the last zone the ECU can adjust for based on the o2 sensor reading. After that it bases it solely on the tune. This means at full throttle your fuelling is off by 2.3%

In general, a positive at higher g/s ranges means more fuel is being added as there is more air in the engine than has been calculated for. So there is more than likely a leak before the turbo, but after the airflow meter.

The turbo inlets like to split so that would be a good place to start looking at a guess.  

 

The timing correction section (does the same as IAM but tweaks things in certain rpms/loads rather than over everything) isn't too bad currently. Imagine as soon as the IAM number raises more will show up in that area. 

 

All in all you should definitely be getting it looked at.

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Thank you! That makes total sense actually.

 

I've had a subtech downpipe installed and I use 98 from mobil.

 

The intake piping before the turbo seems warped and I noticed some oil there too. I'll completely remove it this weekend and observe it better.

Edited by romeyromes
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Thanks mate,

Yeah I am. I have this very intermittent stumbling issue that I cannot pin point hence me going with BTSSM.

I'm getting crazy lean fluctuations on my afr too.

Would a weak fuel pump be the culprit? Or perhaps my warped turbo inlet?

Sent from my F8332 using Tapatalk

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Okay, so my IAM numbers dropped again after a drive last night and has remained the same this morning.

 

I'm new to this logging stuff but I'm going to have a go at it today.

 

Below are the new values. Is it fair to say that the high-ish figures in yellow indicate I am running lean?

 

44303062102_56e51ee1c9_z.jpg

 

 

 

Sent from my F8332 using Tapatalk

 

 

 

 

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If it's removing fuel (which to me a negative % correction looks like it is), that means it's reading rich. An inlet leak after the maf would create a rich environment.

I know nothing about the software you are using, so could be reading it wrong

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