Syste!m too lean bank 1

[steve99]

Originally Posted by jonbonazza

AEM Intake was installed before tune. Tune took intake into account. Brand new OEM Subarau gaskets were used for header and OP. I can take logs using ECUFlash software. What RPM ranges do you suggest I log?

see what it looks like idle to 4000 rpm log long term &short term fuel trim, rpm, load ,mafv, throttle, AFR, commanded AFR

see if the ltft are less than 10% and that the commanded AFR and measured AFR follow each other under load. If your ltft is over 10% under load and the commanded AFR and measured afr are way off then something is wrong. If maf scaling has been done correctly ltft should be less than 5% or possibly less than 3% under load.

did the cel come back after ecu reset

check for air leaks on intake and that maf sensor seated correctly and is clean, especially if you run an oiled filter

Do you have ecutek map switching ? are you on correct map, you did not switch back to stock map or something ?

[jonbonazza]

Originally Posted by steve99

see what it looks like idle to 4000 rpm log long term &short term fuel trim, rpm, load ,mafv, throttle, AFR, commanded AFR

see if the ltft are less than 10% and that the commanded AFR and measured AFR follow each other under load. If your ltft is over 10% under load and the commanded AFR and measured afr are way off then something is wrong. If maf scaling has been done correctly ltft should be less than 5% or possibly less than 3% under load.

did the cel come back after ecu reset

check for air leaks on intake and that maf sensor seated correctly and is clean

Do you have ecutek map switching ? are you on correct map, you did not switch back to stock map of something ?

Okay ill get those logs stat. Cel did not come back, but code came back as "pending". I do have map switching, but they are all the same tune with various racrerom features afaik. I have never actually switched the map.

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[jonbonazza]

@steve99 what can you gather from this ECUTek log? Looks fucked to me, but wanted to get another opinion...
https://www.sendspace.com/file/xosw4a

EDIT: Is it possible to allow us to attach CSV files to posts?

[s2d4]

Originally Posted by jonbonazza

@steve99 what can you gather from this ECUTek log? Looks fucked to me, but wanted to get another opinion...
https://www.sendspace.com/file/xosw4a

EDIT: Is it possible to allow us to attach CSV files to posts?

use datazap.me

[jonbonazza]

http://datazap.me/u/jonbonazza/bad-tune?log=0&data=5-16

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[s2d4]

Your fuel trims are pretty bad....
Who is your tuner?

[jonbonazza]

Graham from FT86 SF. Its an etune that was still being worked on. Thats the 3rd or 4th revision.

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[s2d4]

Originally Posted by jonbonazza

Graham from FT86 SF. Its an etune that was still being worked on. Thats the 3rd or 4th revision.

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on what fuel?

[jonbonazza]

91 pump

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[s2d4]

Originally Posted by jonbonazza

91 pump

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Can you also upload the previous logs you sent to him?

I am not quite sure what he is doing if this is the result of 3-4 revisions and your setup hasn't changed and haven't had any hardware issues.

[jonbonazza]

Ill upload them in the morning. Thanks!

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[steve99]

Originally Posted by s2d4

Can you also upload the previous logs you sent to him?

I am not quite sure what he is doing if this is the result of 3-4 revisions and your setup hasn't changed and haven't had any hardware issues.

agree long term fuel trims look rubbish -8 to +15, if he has not developed a hardware fault or exhaust/intake leak tune does does not look good after 5 revisions.

might be worth pulling maf sensor and cleaning just in case

[jonbonazza]

Now I am curious...

I have uploaded the first 3 logs (I only uploaded normal driving logs. I also have 2nd gear pulls if needed)

http://datazap.me/u/jonbonazza/logs1-normal-driving
http://datazap.me/u/jonbonazza/logs2-normal-driving
http://datazap.me/u/jonbonazza/logs3...?log=0&data=10

[nelsmar]

How long ago did you receive your last update? Considering you were not done with your etune is there a reason you didn't ask your tuner about this CEL? You also have a fair bit of knock correction going on throughout that log. I honestly can't remember how well that intake functions with tuning. Do you have the AEM module plugged in or are you bypassing it and just using the straight maf sensor?