AFR Incredibly high?

[SpeedFromSwede]

Originally Posted by steve99

V1.5x OFT stage 1 tune or V2.062 Stage 1 OFT tune. The V1.5 had offset maf scaling.

If you not already use the V2.062 stage 1 rom if your going to edit maf scaling.

That might have been my problem all along. I've been using the v1 tune with edited maf scaling. I didn't really understand the difference between the two.

[mad_sb]

Originally Posted by SpeedFromSwede

That might have been my problem all along. I've been using the v1 tune with edited maf scaling. I didn't really understand the difference between the two.

make sure you use the correct XML files for the v2 maps, they require specific v2 definitions.

it took me a few attempts to get to the v2 stuff, too many old links floating around and indexed on search engines... this is the correct current download link: scroll to the very bottom for the v2.062 ots maps.

[SpeedFromSwede]

Originally Posted by mad_sb

make sure you use the correct XML files for the v2 maps, they require specific v2 definitions.

I actually created an edited v2 stage 1 tune but wasn't sure if I could use it on my car (I used the correct v2 xmls to edit it). Can you explain the difference between v1 and v2, just a newer updated rom?

[steve99]

Originally Posted by SpeedFromSwede

I actually created an edited v2 stage 1 tune but wasn't sure if I could use it on my car (I used the correct v2 xmls to edit it). Can you explain the difference between v1 and v2, just a newer updated rom?

For A01G roms the v1 and v2 tunes are still based on A01G maps.

so should be no problems, however use the V2 deinition files that come in the download file or editing v2 maps.

the v2 maps are better. especially stage 1 tunes , better afr control and less intake rasp arround 4000 rpm due better cam timings, slightly better top power

you will still likely have to do the maf saling for your perrin 3" intake using vgi utility to get it correct

[SpeedFromSwede]

Originally Posted by steve99

For A01G roms the v1 and v2 tunes are still based on A01G maps.

so should be no problems, however use the V2 deinition files that come in the download file or editing v2 maps.

the v2 maps are better. especially stage 1 tunes , better afr control and less intake rasp arround 4000 rpm due better cam timings, slightly better top power

you will still likely have to do the maf saling for your perrin 3" intake using vgi utility to get it correct

Ok, so I finally got around to logging about 30 mins of closed loop driving using the v2.x oft tunes (with about 150 miles since flash) and the LTFT's haven't gotten any better. Will be plugging this in to VGI and then logging some open loop.

Hopefully this will fix the issue, I can now wipe my finger in my exhaust tip and see fuel. In my mind that isn't good

http://datazap.me/u/speedfromswede/o...log=0&data=1-9

[steve99]

Originally Posted by SpeedFromSwede

Ok, so I finally got around to logging about 30 mins of closed loop driving using the v2.x oft tunes (with about 150 miles since flash) and the LTFT's haven't gotten any better. Will be plugging this in to VGI and then logging some open loop.

Hopefully this will fix the issue, I can now wipe my finger in my exhaust tip and see fuel. In my mind that isn't good

http://datazap.me/u/speedfromswede/o...log=0&data=1-9

sometimes it takes a coulpe of goes to get scaling correct if its xway off.

double check for any intake air leaks and especially the little gasket on the maf sensor mount its very easy to pinch or crease it.

i would expect the perrin supplied scaling to maybe be 5% off max but if your seeing 15% i am starting to suspect a hardware problem or air leak ,

[SpeedFromSwede]

Originally Posted by steve99

sometimes it takes a coulpe of goes to get scaling correct if its xway off.

double check for any intake air leaks and especially the little gasket on the maf sensor mount its very easy to pinch or crease it.

i would expect the perrin supplied scaling to maybe be 5% off max but if your seeing 15% i am starting to suspect a hardware problem or air leak ,

I'm probably going to take it to Mach V near me for their help, but I just don't have time during the week to cooperate with their hours.

I took the MAF out and inspected it all looked fine (clean, good gasket) so I'm not sure what else to do. I don't want to use VGI if my fuel trims are that high and there is potential hardware issue.

Another note is the fuel trims are fine at idle (probably insignificant)
Thanks for all the help, I really appreciate it.

[steve99]

Originally Posted by SpeedFromSwede

I'm probably going to take it to Mach V near me for their help, but I just don't have time during the week to cooperate with their hours.

I took the MAF out and inspected it all looked fine (clean, good gasket) so I'm not sure what else to do. I don't want to use VGI if my fuel trims are that high and there is potential hardware issue.

Another note is the fuel trims are fine at idle (probably insignificant)
Thanks for all the help, I really appreciate it.

I would give the vgi utility a go , if you have checked for leaks maybe the perrin scaling is just off by a fair bit. It should be fine with the trims the ecu was running your commanded afr was following your measured afr reasnobly well.

I just thought it was a bit unusual, but the stock maf sensors can vary 8% or more so its likely yours was just different from the maf sensor perrin did their scaling on.

its a worthwhile excercise and good experience to scale maf sensor

[Toyota John]

It is likely your MAF sensor is out of calibration. Mine is and I had to rescale the MAF table. I imagine you could also get a new MAF sensor. The quality control on the MAF sensor for Subaru is not so good. Mine had high positve fuel trims too. Uncorrected I was about 1.0 AFR off from requested.